Previously, `loadLibs` was called inside the `optimize` function of
the media-optimization-worker, which meant that it could be hit
multiple times causing load errors (as seen in b69c2f7311)
This commit moves that call to a specific message handler (the `install` message)
for the service worker, and refactors the service for the media-optimization-worker
to wait for this installation to complete before continuing with processing
image optimizations.
This way, we know for sure based on promises and worker messages
that the worker is installed and has all required libraries
loaded before we continue on with attempting any processing. The
change made in b69c2f7311 is no
longer needed with this commit.
This new app event will fire whenever a bookmark is created,
edited, or deleted for a post or topic, and replaces these old
app events which had inconsistent APIs:
* page:bookmark-post-toggled
* topic:bookmark-toggled
When the event is triggered, the arguments are in this order:
1. bookmark - The bookmark record created or changed. Will be null
if the bookmark was deleted.
2. target - Object with target (post or topic) and targetId (post ID
or topic ID)
When inviting a group to a topic, there may be members of
the group already in the topic as topic allowed users. These
can be safely removed from the topic, because they are implicitly
allowed in the topic based on their group membership.
Also, this prevents issues with group SMTP emails, which rely
on the topic_allowed_users of the topic to send to and cc's
for emails, and if there are members of the group as topic_allowed_users
then that complicates things and causes odd behaviour.
We also ensure that the OP of the topic is not removed from
the topic_allowed_users when a group they belong to is added,
as it will make it harder to add them back later.
* DEV: allow composer option to skip jumping to a post on save
* DEV: refactor js safe access in jump logic
Co-authored-by: Jarek Radosz <jradosz@gmail.com>
This happens because the state of `canLoadMore` is not cleared as the
refresh occurs, which is enough to make the page think a footer should
be displayed.
No tests here because it's tricky to test refreshing and none of our
existing acceptance tests seem to.
This removes all custom controllers and redis/messagebus logic from discourse-presence, and replaces it with core's new PresenceChannel system.
All functionality should be retained. This implementation should scale much better to large numbers of users, reduce the number of HTTP requests made by clients, and reduce the volume of messages on the MessageBus.
For more information on PresenceChannel, see 31db8352
We don't support any browser needing this for very long: https://caniuse.com/?search=selectionStart
I'm keeping some protection so It doesn’t crash but ultimately `element.selectionStart` should be enough.
Im not removing this in the commit, but the `caret_position.js` file seems barely used.
We had code to open the bookmark modal in two places -- the bookmark
list and also from within a topic. This caused the two code paths to
drift, as in the bookmark list we were not passing in the forTopic or
autoDeletePreferences data into the modal, and we were also not refreshing
the bookmark list when the bookmark was deleted from within the modal.
This commit moves the modal opening code into an importable
function from the controllers/bookmark module, and all callers
have to do is pass it an instance of Bookmark and also options
for what to do for the following:
* onAfterSave
* onAfterDelete
* onCloseWithoutSaving
Before this fix, jumping to posts using the topic timeline scrollbar
will not update the counts since the topic scrollarea is not rerendered.
Follow-up to db337b10ee
Previously when clicking the Delete button for small action posts
there was no way to recover this post if the action was accidental.
Now if canRecover is true on the post, which it is just after it
is deleted and the post is fetched from the server again, we show
an undo button which calls the recover endpoint for the post.
We also now disallow the editing of the post if it is deleted, and
show the proper deleted red CSS on the small action post when deleted.
Instead of using image-uploader, which relies on the old
UploadMixin, we can now use the uppy-image-uploader which
uses the new UppyUploadMixin which is stable enough and
supports both regular XHR uploads and direct S3 uploads,
controlled by a site setting (default to XHR).
At some point it may make sense to rename uppy-image-uploader
back to image-uploader, once we have gone through plugins
etc. and given a bit of deprecation time period.
This commit also fixes `for_private_message`, `for_site_setting`,
and `pasted` flags not being sent via uppy uploads onto the
UploadCreator, both via regular XHR uploads and also through
external/multipart uploads.
The uploaders changed are:
* site setting images
* badge images
* category logo
* category background
* group flair
* profile background
* profile card background
This commit makes the following change to the Edit Bookmark
modal window for clarity:
* If the user is editing an existing bookmark without a reminder set,
hide the "none needed" option. This will draw more attention to the
delete button.
* If the user is editing an existing bookmark with a reminder set for the
future, change the "none needed" option to say "remove reminder, keep bookmark"
To do this, I needed to provide an option to override the labels
for time shortcuts in certain cases, so I could keep the NONE shortcut
but have the different wording.
Two reasons for this change:
1. Better utilization of the screen space (i.e. displaying more than 5 entries on a 13" display)
2. Making user link elements smaller fixes user-card positioning (it no longer displays far to the right, away from the user name/avatar)
The method was only used for mega topics but it was redundant as the
first post can be determined from using the condition where
`Post#post_number` equal to one.
This commit bumps the following uppy modules:
* @uppy/aws-s3
* @uppy/aws-s3-multipart
* @uppy/core
* @uppy/drop-target
* @uppy/xhr-upload
This is done so we can use the new functionality for retrying
failed prepareUploadParts calls, introduced in
e435f4a917.
I also needed to make some changes to composer-upload-uppy to
support this retrying, while at the same time being able to
throw a bootbox with the error message if the number of retries
are exceeded.
To clarify, this problem is not about the topic posts stream, it's about posts streams like the user Activity one in the profile page (or in technical terms anything using the `{{user-stream}}` component).
Post decorations are currently applied inside a `didInsertElement` hook of the `{{user-stream}}` component. However, when the user scrolls the component will load more posts but these will be missing decorations because the `didInsertElement` is only fired once at the beginning of the component lifecycle.
This PR makes the component keep track of the last decorated post/DOM node, and when new posts are loaded the component fire an event for each new post and pass the post's DOM node with the event. Our plugin API
(I noticed this problem when I was working on https://github.com/discourse/discourse-follow/pull/37)
Co-authored-by: Robin Ward <robin.ward@gmail.com>
* FIX: do not display add to calendar for past dates
There is no value in saving past dates into calendar
* FIX: remove postId and move ICS to frontend
PostId is not necessary and will make the solution more generic for dates which doesn't belong to a specific post.
Also, ICS file can be generated in JavaScript to avoid calling backend.
The legacy testing environment will remove the User.current() value before disposing of controllers/components. Presence often involves making HTTP calls during disposal of components, so this can cause issues.
Production, and the modern Ember-CLI environment, do not require this hack, so it is behind an `isTesting() && isLegacyEmber()` check.
Sometimes administrators want to permanently delete posts and topics
from the database. To make sure that this is done for a good reasons,
administrators can do this only after one minute has passed since the
post was deleted or immediately if another administrator does it.
Both `aria-label` and `title` have the same value and NVDA reading both the texts while navigating between buttons. NVDA already has an open issue https://github.com/nvaccess/nvda/issues/7841. We're removing `aria-label` until they fix it.
Previously the sidebar was being rendered in the `-show` routes, which meant that it disappeared and re-appeared when each tab was loading. This commit creates a parent `user-invited` route with the sidebar, and then renders the `-show` view in an outlet.
To avoid an extra HTTP request, the invite counts for the sidebar are fetched by the `-show` routes, and then applied to the parent controller. This means that there can be a very slight delay before the counts are displayed, but it is almost unnoticeable in normal use.
Reimplemented following the revert in ce0daae636
This approach uses the global `e`/`q` shortcuts, rather than shifting focus to the `quote-button` component. The current `quoteState` is used to determine whether the quote-button is currently visible. If yes, an appEvent transmits the intention to the quote-button component. If no, the old behavior is maintained.
Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
This reverts the new e and q shortcuts for quick-edit, and quote. The current implementation of these is causing issues with quoting on mobile devices.
We intend restore these new shortcuts soon.
* Revert "FIX: Apply quote selection workaround to all browsers (#14558)"
This reverts commit 488f716c16.
* Revert "FIX: selection going missing in Safari (#14557)"
This reverts commit 538fe2cc31.
* Revert "UX: adds shortcuts for quote (q) and fast edit (e) (#14552)"
This reverts commit 2af6052307.
- Allow the `/presence/get` endpoint to return multiple channels in a single request (limited to 50)
- When multiple presence channels are initialized in a single Ember runloop, batch them into a single GET request
- Introduce the `presence-pretender` to allow easy testing of PresenceChannel-related features
- Introduce a `use_cache` boolean (default true) on the the server-side PresenceChannel initializer. Useful during testing.
When hide_email_address_taken was disabled, the forgot password modal
showed a flash message and continued to display the form causing
confusion. This change shows the flash message only when an error occurs
and in all other cases it shows a success message and hides the form.
It allows saving local date to calendar.
Modal is giving option to pick between ics and google. User choice can be remembered as a default for the next actions.
The host's category was successfully updated on the database, but the category property was not properly set when rendering the component for the first time.
* FIX: Stop tracking incoming message after navigating away take 2.
Previous fix in d82e5cd37c resulted in
counts being flappy as we cleared the active inbox between routes.
Co-authored-by: Osama Sayegh <asooomaasoooma90@gmail.com>
* DEV: Remove HTML setting type and sanitization logic.
We concluded that we don't want settings to contain HTML, so I'm removing the setting type and sanitization logic. Additionally, we no longer allow the global-notice text to contain HTML.
I searched for usages of this setting type in the `all-the-plugins` repo and found none, so I haven't added a migration for existing settings.
* Mark Global notices containing links as HTML Safe.
After adding an empty state banner to the user bookmarks page, we have found the bug. Steps to reproduce:
- Go to the user bookmarks page
- Search for something that doesn’t exist in bookmarks
- Click again Bookmarked on the sidebar or View All Bookmarks on the user menu again
Previously we would store every FakeRequest object for all tests, resulting in many hundreds/thousands of objects in the `handledRequests` array.
This commit ensures all pretender state is reset between tests.
- There's no need to pass `filter` to `user-notifications-large`. The component doesn't use it.
- Rename css class to avoid confusion (this div has nothing to-do with the Select Kit)
- Remove duplicated declarations in test fixtures
This is `console.log`'d to the browser console. run-qunit will print this to stdout. testem will not, so a custom reporter is implemented to print this message.
The `--enable-precise-memory-info` is added so that chrome provides high-resolution memory information. This API is not supported by firefox. The logic will degrade gracefully.
Note this commit is also adding support for teardown in pre-initializers just like we have for initializers.
Co-authored-by: Jarek Radosz <jradosz@gmail.com>
Co-authored-by: David Taylor <david@taylorhq.com>
We were using multiple methods to check which environment we're running in. This commit switches us to use the isLegacyEmber helper consistently. This should be a no-op, but makes the code much easier to read
Under Ember CLI, we create a new application instance for each test. We were not correctly destroying it after the test, causing many references to be maintaned (e.g. at the end of a test run, `Ember.Namespace.NAMESPACES` would have an entry for each application instance).
Calling `destroy` on the application instance tidies up these references, and is one step towards fixing our test memory leak problem. Unfortunately there still seem to be other references being held to the application, so this commit is not a total fix.
The all inboxes was introduced in
016efeadf6 but we decided to roll it back
for performance reasons. The main performance challenge here is that PG
has to basically loop through all the PMs that a user is allowed to view
before being able to order by `Topic#bumped_at`. The all inboxes was not
planned as part of the new/unread filter so we've decided not to tackle
the performance issue for the upcoming release.
Follow-up to 016efeadf6
As sharing has some hover behavior, it was looking slightly clunky with fast edit changing position. Putting sharing at the last position will reduce this effect.
When the loading spinner is removed (e.g. via the loading-slider component), the subcategory list view will persist, even when no longer required. This is because we were conditionally rendering the list into the `header-list-container` outlet. When the condition was false, we were doing nothing. Instead, we should use `disconectOutlet` to make sure the content is removed from the DOM.
Firefox does not return a PerformanceMeasure object when using
performance.mark and performance.measure, even though MDN says it
should https://developer.mozilla.org/en-US/docs/Web/API/Performance/measure#return_value
So for now, we disable the upload instrumentation with a test
to see if a PerformanceMeasure (or anything really) is returned.
When creating a reply after already navigating out of the
topic (e.g. open the reply composer, go to a different topic,
then create the post), the _removeDeleteOnOwnerReplyBookmarks
function was erroring because it relied on the topic model
being present.
We can skip this function altogether if the topic model is _not_
present, because the PostCreator already takes care of deleting
bookmarks with the on_owner_reply auto_delete_preference. The
_removeDeleteOnOwnerReplyBookmarks function just cleans up the
in-memory post stream and topic model.
This commit allows for measuring the time taken for
individual uploads via the new uppy interfaces, only
if the enable_upload_debug_mode site setting is enabled.
Also in this PR, for upload errors with a specific message
locally, we return the real message to show in the modal
instead of the upload.failed message so the developer
does not have to dig around in logs.
The file size error messages for max_image_size_kb and
max_attachment_size_kb are shown to the user in the KB
format, regardless of how large the limit is. Since we
are going to support uploading much larger files soon,
this KB-based limit soon becomes unfriendly to the end
user.
For example, if the max attachment size is set to 512000
KB, this is what the user sees:
> Sorry, the file you are trying to upload is too big (maximum
size is 512000KB)
This makes the user do math. In almost all file explorers that
a regular user would be familiar width, the file size is shown
in a format based on the maximum increment (e.g. KB, MB, GB).
This commit changes the behaviour to output a humanized file size
instead of the raw KB. For the above example, it would now say:
> Sorry, the file you are trying to upload is too big (maximum
size is 512 MB)
This humanization also handles decimals, e.g. 1536KB = 1.5 MB
This commit also hides a number of options which are not used during Discourse development.
Change have been tested on both the legacy `/qunit` route, and the Ember CLI `/tests` route.
This adds support for `qunit_skip_core`, `qunit_skip_plugins` and `qunit_single_plugin` parameters on the Ember CLI `/tests` route using the `addModuleExcludeMatcher` API. Legacy support is maintained for the `/qunit` route.
".search-menu" matches the parent element of the element that was
previously selected. This is a better choice because it offers some
flexibility over the DOM structure without breaking the keyboard
shortcuts.
Instead of going to the OP of the topic for topic-level bookmarks
(which are bookmarks where for_topic is true) when clicking on the
bookmark in the quick access menu or on the user bookmark list,
this commit takes the user to the last unread post in
the topic instead. This should be generally more useful than landing
on the unchanging OP.
To make this work nicely, I needed to add the last_read_post_number to
the BookmarkQuery based on the TopicUser association. It should not add
too much extra weight to the query, because it is limited to the user
that we are fetching bookmarks for.
Also fixed an issue where the bookmark serializer highest_post_number was
not taking into account whether the user was staff, which is when we
should use highest_staff_post_number instead.
Allows creating a bookmark with the `for_topic` flag introduced in d1d2298a4c set to true. This happens when clicking on the Bookmark button in the topic footer when no other posts are bookmarked. In a later PR, when clicking on these topic-level bookmarks the user will be taken to the last unread post in the topic, not the OP. Only the OP can have a topic level bookmark, and users can also make a post-level bookmark on the OP of the topic.
I had to do some pretty heavy refactors because most of the bookmark code in the JS topics controller was centred around instances of Post JS models, but the topic level bookmark is not centred around a post. Some refactors were just for readability as well.
Also removes some missed reminderType code from the purge in 41e19adb0d
We want to be able to skip plugins from doing any work under
certain conditions, and to be able raise their own errors if
a file being uploaded is completely incompatible with the concept
of the plugin if it is enabled. For example, the UppyChecksum plugin
is happy to skip hashing large files, but the UppyUploadEncrypt
plugin from discourse-encrypt relies on the file being encrypted
to do anything with the upload, so it is considered a blocking
error if the user uploads a file that is too large.
This improves the base functions available in uppy-plugin-base and
extendable-uploader to handle this, as well as introducing a
HUGE_FILE_THRESHOLD_BYTES variable which represents 100MB in bytes,
matching the ExternalUploadManager::DOWNLOAD_LIMIT on the
server side.
discourse-encrypt to take advantage of this new functionality will
follow in discourse/discourse-encrypt#141
We want to be able to skip plugins from doing any work under
certain conditions, and to be able raise their own errors if
a file being uploaded is completely incompatible with the concept
of the plugin if it is enabled. For example, the UppyChecksum plugin
is happy to skip hashing large files, but the UppyUploadEncrypt
plugin from discourse-encrypt relies on the file being encrypted
to do anything with the upload, so it is considered a blocking
error if the user uploads a file that is too large.
This improves the base functions available in uppy-plugin-base and
extendable-uploader to handle this, as well as introducing a
HUGE_FILE_THRESHOLD_BYTES variable which represents 100MB in bytes,
matching the ExternalUploadManager::DOWNLOAD_LIMIT on the
server side.
discourse-encrypt to take advantage of this new functionality will
follow in https://github.com/discourse/discourse-encrypt/pull/141
- do not reduce opacity of disabled buttons if they are loading
- replace ‘|’ by single quotes not double quotes
- always start from index 0
- reduces amount of work by checking row's length
- apply quotefix to fallback
- do not add 1 to caretposition if index is 0
The algorithm will now do the following:
- split selection to retain only first line
- removes possible "* "
- check for first inclusion
- fallback to first row if nothing found
We don't actually use the reminder_type for bookmarks anywhere;
we are just storing it. It has no bearing on the UI. It used
to be relevant with the at_desktop bookmark reminders (see
fa572d3a7a)
This commit marks the column as readonly, ignores it, and removes
the index, and it will be dropped in a later PR. Some plugins
are relying on reminder_type partially so some stubs have been
left in place to avoid errors.
This commit sets `tap_failed_tests_only` to `true` in our testem config, so now only the failing tests will show in our GitHub CI Ember test runs, which saves developers from having to hunt through all of the passing tests using GitHub's janky console output scrollback.
There was a check for closed code blocks (which had both opening and
closing markups), but it did not work for the case when the text ends
in an open code block.
Administrators can use second factor to confirm granting admin access
without using email. The old method of confirmation via email is still
used as a fallback when second factor is unavailable.
The previous excerpt was a simple truncated raw message. Starting with
this commit, the raw content of the draft is cooked and an excerpt is
extracted from it. The logic for extracting the excerpt mimics the the
`ExcerptParser` class, but does not implement all functionality, being
a much simpler implementation.
The two draft controllers have been merged into one and the /draft.json
route has been changed to /drafts.json to be consistent with the other
route names.
This is my second try at this. The first b246a63a59 raised an issue
with the event delegation not working because the topic id changed.
This adds support for delegating events to dynamic keys by passing a
function where a static key would normally be needed. This means that
each timeline will have its own unique state key and events will only
delegate to the proper topic.
Translations are often multi-line. Using a regular `<input>` doesn't allow newlines, so if you try to edit a multiline theme translation, all the line breaks will be removed.
This commit updates the theme translations UI to use `<textarea>`, just like the core translation editing UI.
allowUpload can be false for the composer if there are no
allowed file extensions. This causes the _bindMobileUploadButton
code to fail because the button does not get rendered in the
template if !allowUpload. This commit changes composer-editor
to only bind upload functionality if allowUpload.
We've observed an error where the back button is displayed improperly in
the topic timeline. It's unfortunately been hard to reproduce but we
suspect it's related to leftover state when re-rendering.
This fix optimistically tries to fix the error by introducing the
topic's id to the unique key the widgets use for state. We can deploy
this and keep an eye out for the bug in the future.
This fixes an error when trying to upload a profile
background image for the user card when the
enable_direct_s3_uploads setting was true:
> Failed to execute 'send' on 'XMLHttpRequest': The object's state must be OPENED.
This was fixed in the upstream commit by the uppy devs:
5937bf2127
When a user archives a personal message, they are redirected back to the
inbox and will refresh the list of the topics for the given filter.
Publishing an event to the user results in an incorrect incoming message
because the list of topics has already been refreshed.
This does mean that if a user has two tabs opened, the non-active tab
will not receive the incoming message but at this point we do not think
the technical trade-offs are worth it to support this feature. We
basically have to somehow exclude a client from an incoming message
which is not easy to do.
Follow-up to fc1fd1b416
This abstracts interaction with uppy for uppy plugin classes
into base classes for Preprocessor plugins, so anyone
making these uppy plugins doesn't have to think as much about uppy
underneath the hood. This also makes the logging and validation
nicer, and provides a more consistent way to emit progress and
completion events.
In a future commit, we will introduce another base class for
`UploadUploaderPlugin` which will be used to be able to hijack
the upload process to go to a different provider (e.g. for discourse-video)
Short URLs were resolved before diffHTML was loaded and content was
swapped by it, which meant that no URLs were found and the URLs remained
unsolved. This caused image elements to be blank.
* DEV: Updated diffHTML to 1.0.0-beta.20
Watched words of type 'replace' or 'link' replaced the text inside
mentions or hashtags too, which broke these. These types of watched
words must skip any match that has an @ or # before it.
At this point in time, we do not think supporting unread and new when an
admin is looking at another user's messages is worth supporting.
Follow-up to fc1fd1b416
There are a few fixes at play here:
1) We were still not initializing objects to the correct types.
2) If a debounce timed out, it was returning a string instead of an
array which was not appropriately handled.
3) In testing mode we never cancel the search promise for stability.
In order to include the new/unread count in the browse more message
under suggested topics, a couple of technical changes have to be made.
1. `PrivateMessageTopicTrackingState` is now auto-injected which is
similar to how it is done for `TopicTrackingState`. This is done so
we don't have to attempt to pass the `PrivateMessageTopicTrackingState`
object multiple levels down into the suggested-topics component. While
the object is auto-injected, we only fetch the initial state and start
tracking when the relevant private messages routes has been hit and only
when a private message's suggested topics is loaded. This is
done as we do not want to add the extra overhead of fetching the inital
state to all page loads but instead wait till the private messages
routes are hit.
2. Previously, we would stop tracking once the `user-private-messages`
route has been deactivated. However, that is not ideal since
navigating out of the route and back means we send an API call to the
server each time. Since `PrivateMessageTopicTrackingState` is kept in
sync cheaply via messageBus, we can just continue to track the state
even if the user has navigated away from the relevant stages.
The smoke test has been failing with the error:
```
TypeError: Cannot read properties of undefined (reading 'Core')
```
Since de20c46077
and 9873a942e3 this error has been occurring,
possibly now because Uppy is required by a plugin. Adding uppy.js into
the require list for theme_qunit_vendor.js fixes the issue.
This new interface will be used explicitly to add upload
preprocessors in the form of uppy plugins. These will be
run for each upload in the composer (dependent on the logic
of the plugin itself), before the UppyChecksum plugin is
finally run.
Since discourse-encrypt uses the existing addComposerUploadHandler
API for essentially preprocessing an upload and not uploading it
to a different place, it will be the first plugin to use this interface,
along with the register-media-optimization-upload-processor initializer
in core.
Related https://github.com/discourse/discourse-encrypt/pull/131.
Improves the create account modal for screen readers by doing the following:
* Making the `modal-alert` section into an `aria-role="alert"` region and making it show and hide using height instead of display:none so screen readers pick it up. Made a change so the field-related error messages are always shown beneath the field.
* Add `aria-invalid` and `aria-describedby` attributes to each field in the modal, so the screen reader will read out the error hint on error. This necessitated an Ember component extension to allow both the `aria-*` attributes to be bound and to render on `{{input}}`.
* Moved the social login buttons to the right in the HTML structure so they are not read out first.
* Added `aria-label` attributes to the login buttons so they can have different content for screen readers.
* In some cases for modals, the title that should be used for the `aria-labelledby` attribute is within the modal content and not the discourse-modal-title title. This introduces a new titleAriaElementId property to the d-modal component that is then used by the create-account modal to read out the title
------
This is the same as e0d2de73d8 but
fixes the Ember-input-component-extension to use the public
Ember components TextField and TextArea instead of the private
TextSupport so the extension works in both normal Ember and
Ember CLI.
Improves the create account modal for screen readers by doing the following:
* Making the `modal-alert` section into an `aria-role="alert"` region and making it show and hide using height instead of display:none so screen readers pick it up. Made a change so the field-related error messages are always shown beneath the field.
* Add `aria-invalid` and `aria-describedby` attributes to each field in the modal, so the screen reader will read out the error hint on error. This necessitated an Ember component extension to allow both the `aria-*` attributes to be bound and to render on `{{input}}`.
* Moved the social login buttons to the right in the HTML structure so they are not read out first.
* Added `aria-label` attributes to the login buttons so they can have different content for screen readers.
* In some cases for modals, the title that should be used for the `aria-labelledby` attribute is within the modal content and not the discourse-modal-title title. This introduces a new titleAriaElementId property to the d-modal component that is then used by the create-account modal to read out the
This adds a new property, `pluginId` which you can pass to `modifyClass`
which prevent the class from being modified over and over again.
This also includes a fix for polls which was leaking state between tests
which this new functionality exposed.
When using ComposerUpload and/or ComposerUploadUppy, we were
always calling bindMobileUploadButton. However with more composer-like
interfaces being developed, we need this to be optional, as not
everywhere will have a separate mobile upload button to bind to.
Also makes it so the composer extending the ComposerUpload mixins is
responsible for explicitly unbinding the mobile upload button if
it needs to.