* Eliminates need to click more than one checkbox to have preferences saved.
* Adds debouncing to saving user-selected menu item properties.
* Also removes discrepancies between available nav menu item properties on admin page vs Customizer.
Fixes#35273.
Props afercia, westonruter.
Built from https://develop.svn.wordpress.org/trunk@36908
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* Removes double `margin-bottom` from all the media controls.
* All media controls now send `{settingId}-attachment-data` messages to the preview when a media setting is updated so that the preview has access to the attachment data.
* Fixes receiving of `attachment-data` message for `custom_logo` which resulted in instant JS-applied preview not working. See #36096.
See #33755.
Fixes#35941.
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* Improves parity between partials and controls. A partial or control can be settingless if instantiated with `settings` param as empty array (otherwise, if null, then the partial/control ID is used).
* Eliminate need to create dummy settings that serve no purpose except to place a control in the UI.
* Removes dummy settings for `create_new_menu` and `new_menu_name`.
* Introduces `WP_Customize_Control::$capability` and `WP_Customize_Partial::$capability`, and if set checks them in the respective `check_capabilities()` methods.
* Prevents PHP fatal error from happening when non-existing settings are provided to control: "Call to a member function `check_capabilities()` on a non-object".
* Fixes issue where nav menu items and widgets were no longer working with selective refresh because cap check was failing.
See #27355.
Fixes#35926.
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Ensures that intentional backslashes (e.g. "\o/") can be used in:
* Site title
* Site description
* Nav menu name
* Custom Menu widget title
* Tag Cloud widget title
* Text widget body if can't `unfiltered_html`
The latter three are also fixed on the widgets admin page.
Fixes#35898.
Built from https://develop.svn.wordpress.org/trunk@36622
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Prevents slashes from being added when a user without `unfiltered_html` previews a nav menu item containing an apostrophe or some other slashable character, and prevents the loss of an intentional slash (e.g. "\o/") when saving a nav menu item, regardless of capability.
Fixes#35869.
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* Introduce `customize_post_value_set_{$setting_id}` and `customize_post_value_set` actions which are done when `WP_Customize_Manager::set_post_value()` is called.
* Clear the `preview_applied` flag for aggregated multidimensional settings when a post value is set. This ensures the new value is used instead of a previously-cached previewed value.
* Move `$is_preview` property from subclasses to `WP_Customize_Setting` parent class.
* Deferred preview: Ensure that when `preview()` short-circuits due to not being applicable that it will be called again later when the post value is set.
* Populate post value for updated-widget with the (unsanitized) JS-value in `WP_Customize_Widgets::call_widget_update()` so that value will be properly sanitized when accessed in `WP_Customize_Manager::post_value()`.
Includes unit tests with assertions to check the reported issues and validate the fixes.
Fixes defect introduced in [35007].
See #32103.
Fixes#34738.
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* Apply `title_save_pre`, `excerpt_save_pre`, and `content_save_pre` filters on a nav menu item's `title`, `attr_title`, and `description` properties respectively. This ensures that arbitrary markup can be supplied if the user has `unfiltered_html` cap, and for these fields to have markup stripped if not.
* Ensure a nav menu item's `post_status` is sanitized as `publish` or `draft` using the same conditions as `wp_update_nav_menu_item()`.
* Align `WP_Customize_Nav_Menu_Item_Setting::sanitize()` behavior for sanitizing `position` to be the same as `wp_update_nav_menu_item()`.
* Also apply `nav_menu_attr_title` and `nav_menu_description` filters in `WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item()` to ensure that previewing markup entered into menu item description will preview the same way as when the nav menu item is saved.
* Add unit tests.
Fixes#32812.
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Weston Ruter
Konstantin Obenland
Dominik Schilling
Drew Jaynes
Sergey Biryukov
Scott Taylor
Helen Hou-Sandí
Andrea Fercia