* REFACTOR: Get us closer to no `Discourse` constants in tests
* REFACTOR: Remove `Discourse.currentUser`
* REFACTOR: `prioritizeNameInUx` is really a helper and can use context
* REFACTOR: Rename test
* REFACTOR: Remove `Discourse.MarkdownItURL` and use session
* REFACTOR: Remove unused `LetterAvatarVersion`
* REFACTOR: Remove unused `Discourse.ThemeSettings`
* REFACTOR: Remove unused CDN constants
* REFACTOR: The `globalNotice` property doesn't exist anymore
* REFACTOR: Remove `Discourse.__container__` from plugin api
* REFACTOR: Consider `logout()` a helper and remove container.
* DEV: Move `Discourse.getURL` and related functions to a module
* DEV: Remove `Discourse.getURL` and `Discourse.getURLWithCDN`
* FIX: `get-url` is required for server side code
* DEV: Deprecate `BaseUri` too.
Joffrey JAFFEUX
Robin Ward