Currently, middle-clicking on a hashtag search result will open a new
instance of the WebUI, which is inconsistent with middle-clicking on
an account result, or a hashtag in a toot.

* Allow to show a specific status in the admin interface

* Let the front-end know the current account is a moderator

* Add admin links to status and account menus

If the current logged-in user is an admin, add quick links to the admin
interface in account and toot dropdown menu. Suggestion by @ashkitten

* Use @statuses.first instead of @statuses[0]

The modal-handling code gives back focus to the element focused when the
modal opened. However, in the case of reply confirmation, it would do so
*after* the composer code itself requested focus.

Fixes #9568

* Always use the scrollable class for the ScrollList component

Fixes #9499 as well as empty timelines' scrollbar “blinking”
between loading state and empty state.

* Do not display empty message when the list is known to have more elements

Fixes #9500

* Fix LoadMore usage in account media gallery

(Even though that codepath is probably never actually used…)

* Make account media gallery more consistent with account timeline

Fixes #9498

Display “load more” more consistently, add a loading indicator on first load.

* Fix “load more” button when no data has been fetched

Fixes #9259

So that opening a profile feels faster. Also, pinned toots are not
shown before other toots have loaded. Also, if no toots are loaded,
added empty message

Fix #4716

- Use object properties rather than component state for
  mouseMovedRecently and scrollToTopOnMouseIdle flags

- Remove redundant scrollToTop prop call, also fixing an attempt to call
  an undefined prop.

Fixes #9217

- On recent mouse movement, hold timeline position so statuses remain in
  place for interactions in progress.

- If the timeline had been scrolled to the top before mouse movement,
  restore scroll on mouse idle.

* Include preview cards in status entity in REST API

* Display preview card in-stream

* Improve in-stream display of preview cards

Reminder: Suggestions were added in #7918 and are based on who you
interact with who you do not follow. E.g. if you boost someone a lot
from seeing other people's boosts of that person, it makes sense you
might be interested in following the original source; or if you reply
to someone a lot, maybe you'd want to follow them

Each suggestion can be dismissed

This reverts commit c7e9f9ff1e.

* RTL: remove blank character inside bdi

* Update app/javascript/mastodon/components/display_name.js

Co-Authored-By: mabkenar <ampbox@gmail.com>

* Add conversations API

* Add web UI for conversations

* Add test for conversations API

* Add tests for ConversationAccount

* Improve web UI

* Rename ConversationAccount to AccountConversation

* Remove conversations on block and mute

* Change last_status_id to be a denormalization of status_ids

* Add optimistic locking

* Revert "Fix some icon names changed by the Font Awesome 5. (#8796)"

This reverts commit 3f9ec3de82.

* Revert "Migrate to font-awesome 5.0. (#8799)"

This reverts commit 8bae14591b.

* Revert "Fix some icons names, unavailable in fontawesome5 (free license). (#8792)"

This reverts commit b9c727a945.

* Revert "Update the icon name changed by the Font Awesome 5. (#8776)"

This reverts commit 17af4d27da.

* Revert "Add bot icon to bot avatars and migrate to newer version of Font Awesome (#8484)"

This reverts commit 4b794e134d.

Show "read more" link on overly long in-stream statuses

- pencil => pencil-alt
- sliders => sliders-h

related: #8484 #8776

* Migrate to newer version of Font Awesome

* Add bot icon to bot avatars

* Only focus first item of dropdown if it was opened via keyboard

* Improve keyboard VS mouse navigation of dropdown menus

* Add alwaysShowScrollbar prop to ScrollableList

* Fix followers/follows layout issues from #8418

Fix #8192

* Pass through video description as necessary.

* Add title to video, matching aria-label.

* Give focused status a sensible aria-label for screen readers

Fix #8192

* Use content warning in aria-label unless expanded

Fix #8191

Fix #4485

* Make dropdown animations respect their placement

Also fix the corner radius on the privacy dropdown button when using top placement

* Fix code style issue

Fix #8274

This includes clicks on hashtags, mentions, display names and media in the
timeline; and usernames in reply-indicator, detailed status, and the boost
modal.

* Add keyword filtering

    GET|POST       /api/v1/filters
    GET|PUT|DELETE /api/v1/filters/:id

- Irreversible filters can drop toots from home or notifications
- Other filters can hide toots through the client app
- Filters use a phrase valid in particular contexts, expiration

* Make sure expired filters don't get applied client-side

* Add missing API methods

* Remove "regex filter" from column settings

* Add tests

* Add test for FeedManager

* Add CustomFilter test

* Add UI for managing filters

* Add streaming API event to allow syncing filters

* Fix tests

"Do not dumb here. Not dumb area here."