* Fix composer character-counter bouncing around UI elements
* Fix composer toolbar padding when keyboard is dismissed on iOS
* Use the full name of the language in the composer footer
* Add headings to the DropdownButton
* Update the composer language control to use a simpler dropdown
* Fix lint
* Add translate link to Post component used in notifications
* Fix lint
* Add locale helpers for narrowing languages
* Add a translate link to posts in a different language
* Update language filtering to use narrowing when multiple declared
* Fix a few more RTL layout cases
* Fix types
* Add a content-language preference control
* Update whats hot to only show the selected languages and to refresh on lang pref changes
* Fix lint
* Fix tests
* Add missing accessibility role
