Fixes #14523

Fixes #14511

- Remove (incomplete) list of supported formats
- List types of media (image, video, audio)
- Tell that several images could be uploaded using plural

Fixes #13698

Fixes #13573

For some reason (I suspect this may be related to focusing the item before it
got drown by the browser), Firefox scrolls to top when bringing up dropdown
menus with pre-selected items.

This commit uses the “preventScroll” option as, due to the placement behavior,
the menu should be visible anyway and not trigger scrolling.

Fixes #13527

- Fixes caught keyboard events being needlessly propagated
- Let up/down arrows wrap around like the tab key does
- Refactor common code

This commit redesign the polls and increases characters limit for the
options from 25 to 50 characters, giving pollsters more freedom.

Summarizing, the redesign is making the polls more adaptive for upcoming
changes to the options characters limit: the bar, or a "chart", is now
displayed separately from the option itself; vote check mark is moved
next to the option text, making the percentages take less space. Option
lengths are taken into account and text is wrapped to multiple lines
if necessary to avoid overflow.

* JS-linter: fix trailing comma's

* Configure eslinter to ignore this onchange error.

* Improve description of privacy levels in compose interface

* Change strings in defaultMessage and source as well as english

Co-authored-by: Thibaut Girka <thib@sitedethib.com>

* Add announcements

Fix #11006

* Add reactions to announcements

* Add admin UI for announcements

* Add unit tests

* Fix issues

- Add `with_dismissed` param to announcements API
- Fix end date not being formatted when time range is given
- Fix announcement delete causing reactions to send streaming updates
- Fix announcements container growing too wide and mascot too small
- Fix `all_day` being settable when no time range is given
- Change text "Update" to "Announcement"

* Fix scheduler unpublishing announcements before they are due

* Fix filter params not being passed to announcements filter

This reverts commit 054ef83f.

* Fix poll options not being selectable via keyboard

Fixes #12384

* Improve styling of poll option checkboxes/radio buttons

* Use more appropriate ARIA roles for poll options

* Allow switching between single and multiple choice from keyboard

* Coding style

* Avoid using .bind()

Until this patch, drag'n'drop and copy-paste allowed to start uploading as
long as the number of *finished* uploads was below the limit.

- Disable the “add option” button instead of hiding it
- Allow poll option inputs to scale to full width

* [WiP] Add a confirmation modal before logging out from the web interface

* Add confirmation to logout link in getting started footer

* Please CodeClimate

Move media description input to a modal and unite that modal with
the focal point modal. Add a hint about choosing focal points, as
well as a preview of a 16:9 thumbnail. Enable the user to watch
the video next to the media description input.

Fix #8320
Fix #6713

* Trap tab in privacy dropdown

* Give focus back to last focused element when privacy dropdown menu closes

* Actually give back focus to the element that had it before clicking the dropdown

* Change icon buttons styles to make hover/focused states more obvious

* Fix CW button size inconsistency

* Fix icon button background color consistency

* Add search results pagination to web UI

Fix #10737

* Fix code style issue

* Added logout to dropdown menu

* Triggering build-and-test with empty commit as it seems it failed due to some internal failure

* Looks fine, ready to review

* Added changes from review

* method can be null without any problems

* Also target can be null

Avoids jumping the scroll around vertically when giving it focus and
editing long toots.

Follow-up to #11112

Fix #7940

* Add message telling FTS is disabled when no toot can be found because of this

Fixes #11082

* Remove info icon and reword message

* Add audio uploads

Fix #4827

Accept uploads of OGG, WAV, FLAC, OPUS and MP3 files, and converts
them to OGG. Media attachments get a new `audio` type. In the UI,
audio uploads are displayed identically to video uploads.

* Improve code style