* Add actions and reducers for polls

* Add poll button

* Disable media upload if poll enabled

* Add poll form

* Make delete & redraft work with polls

* Fix ActivityPub poll results being serialized even with hide_totals

* Fix poll refresh button having a different font size

* Display poll in OpenGraph description

* Fix NoMethodError when serializing votes

Regression from #10158

* Fix polls on public pages being broken for non-logged-in users

* Do not show time remaining if poll has no expiration date

* Allow unselecting choices in multiple choice polls

* Properly disable checkboxes/radio buttons for polls in public pages

* Visually differentiate checkboxes and radio buttons

* Add polls

Fix #1629

* Add tests

* Fixes

* Change API for creating polls

* Use name instead of content for votes

* Remove poll validation for remote polls

* Add polls to public pages

* When updating the poll, update options just in case they were changed

* Fix public pages showing both poll and other media

At 480px height, there is not enough space to fully display the footer.

Fix #6060

* Add image descriptions to searchable post content.

* Allow multi-line image descriptions.

* Request image descriptions in the same query as posts when creating the search index.

(see https://github.com/tootsuite/mastodon/pull/10036#discussion_r256551624)

* Add list title editing

Port changes made by ash for glitch-soc

* Code style fixes

Fixes #9990

* fix large line breaks

* fix ascii art posts

* Add hashtag filter to profiles

GET /@:username/tagged/:hashtag
GET /api/v1/accounts/:id/statuses?tagged=:hashtag

* Display featured hashtags on public profile

* Use separate model for featured tags

* Update featured hashtag counters on-write

* Limit featured tags to 10

Improve sorting of default themes in the dropdown

In #9210 the track color was changed to transparent for no apparent reason. This PR restores the previous color selections implemented in #8653 while keeping the updated property name. Per https://github.com/tootsuite/mastodon/pull/9210#issuecomment-441788776 there is no particular reason for the color change in #9210.

Fix #9845

Fix #9833

- Fix height not updating when clicking show more on public hashtag page
- Add header to the public hashtag page
- Change text size and margins on the public hashtag page

* Fix hashtag timeline width being potentially larger than window width

* Add automatic computation of scrollbar width

Instead of forcing 90vh for the scrollable part of the timeline's height as
in #9781 (which may be off), use `display: flex`, exactly like on desktop.

* Adjust admin UI right panel size

* Fix typo

* change height on narrow view to take 100% of screen

* add empty line before @media

Fix #9697

* Add moderation warnings

Replace individual routes for disabling, silencing, and suspending
a user, as well as the report update route, with a unified account
action controller that allows you to select an action (none,
disable, silence, suspend) as well as whether it should generate an
e-mail notification with optional custom text. That notification,
with the optional custom text, is saved as a warning.

Additionally, there are warning presets you can configure to save
time when performing the above.

* Use Account#local_username_and_domain

* Make sure loading indicator has enough vertical space

* Respect reduce_motion setting for loading indicator

* Prepare to load onboarding as a full page

* Update the first-time introduction

* Improve responsive design

* Replace speech bubble with logo

* Increase text size and reword first paragraph

* Remove "most popular" tab from profile directory, add responsive design

* Remove unused translations

* create FilterBar componer and its container, unstyled

* introduce basic styling for FilterBar

* add selection css

* allow FilterBar to display active CSS with js

* connect the FilterBar to the Redux state

* change getNotifications to use filter

* remove temporary comments

* add an option to turn the FilterBar off in settings

* fix showFilterBar data type to boolean

* fix eslint errors

* add English and Polish translations

* allowed filter bar overflow to accomodate for longer languages

* fix mispelled translation key

* add unified CSS look

* replace text in FilterBar with icons

* add tooltips

* replace text @ with an icon

* introduce simple and advanced filtering view

* add ability to toggle the advanced view

* add Polish translations

* change Advanced View description to be more clear

* make each filter flush notifications and load new ones, fixing pagination

* simplify getNotifications once frontend filtering is not needed for FilterBar

* add a semicolon

* Revert "simplify getNotifications once frontend filtering is not needed for FilterBar"

This reverts commit 9f4be78571.

* reset filter to 'all' when turning off FilterBar

Add right-padding to select elements to take the up/down arrows into
account.

Thanks Tixie for finding the issue!

* Fix missing variable in directory page title

* Order hashtags by number of people instead of alphabetically

* Add icon to OpenGraph preview of directory page

* Prevent line breaks in hashtags and ensure lowercase in the table

Fix #5578

* add RelativeTimestamp elements

* style the elements properly with CSS

* Volume sliders for videos #7429

* Code formatting updates

* Code formatting updates

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