follow up #3564

* Re-add clear notifications button

* remove connect() in column_settings

* one line

* remove unused props

* Move ancestors/descendants out of timelines reducer

* Refactor timelines reducer

All types of timelines now have a flat structure and use the same
reducer functions and actions

* Reintroduce some missing behaviours

* Fix wrong import in reports

* Fix includes typo

* Fix issue related to "next" pagination in timelines and notifications

* Fix bug with timeline's initial state, expandNotifications

- Use plaintext
- Strip out URLs
- Strip out mentions
- Strip out hashtags
- Strip out whitespace from "overall" count
- Consistent between JS and Ruby

* i18n

* i18n

* i18n

* i18n

* i18n

* Check ready state of document in public pages

* add check interactive

* Add explit admin actions to (re)subscribe/unsubscribe remote accounts
and re-download avatar/header

* Improve how admin NSFW toggle looks

before the full-size image is loaded

* Add regex filter on the community timeline and the public timeline

* correcting

* Adjust the height of header buttons

* Remove trailing spaces

* Remove trailing spaces

* Solve some code duplication

* reset the state of the locale files in app/javascript/mastodon/locales

* adjust to upstream

* adjust to upstream

* change keys of locale settings

* Add react/no-string-refs ESLint rule

* Add react/jsx-boolean-value ESLint rule

* Add react/jsx-closing-bracket-location ESLint rule

* Add react/jsx-indent ESLint rule

* Add react/jsx-curly-spacing ESLint rule

* Add react/jsx-equals-spacing ESLint rule

* Add react/jsx-first-prop-new-line ESLint rule

* Add react/jsx-no-duplicate-props ESLint rule

* Add react/jsx-tag-spacing ESLint rule

* Add quotes ESLint rule

* Add jsx-quotes ESlint rule

* Sort ESLint rules

* Add support key shortcut to Onboarding Modal

* this.state.pages -> this.pages

* i18n Update : Add preference setting for delete toot modal

Adding a line for "Add preference setting for delete toot modal"

* i18n update for pin/unpin

Update to add two more translations

* i18n update to have the dates in plain occitan

* Removed the blank line

* %{selft} back in the translation

ref: #3538 ("Extended information" -> "About this instance") and #3519

Signed-off-by: lindwurm <lindwurm.q@gmail.com>

* Add Japanese translations (pin)

* "ピン留め" is more general

This change follows #3519, which does the same for the Chinese variants. Or should it be simply "About"?

* Allow mounting arbitrary columns

* Refactor column headers, allow pinning/unpinning and moving columns around

* Collapse animation

* Re-introduce scroll to top

* Save column settings properly, do not display pin options in
single-column view, do not display collapse icon if there is
nothing to collapse

* Fix one instance of public timeline being closed closing the stream
Fix back buttons inconsistently sending you back to / even if history exists

* Getting started displays links to columns that are not mounted

* zh-cn.json: "additional info" -> "more info"

This commit changes the "extended info" (about/more) text to something that translates to "more info", as "additional info" in zh can sound like appending things to the (ugh) navbar, I guess.

Or should I just change it to "about this site" (关于本站)?

* zh-cn.json: navbar.info -> "about this site"

* zh-臺灣.json: navbar.info -> "about this site"

This implementation is a bit smaller and still has the following benefits:

* No need of app/javascript/packs/custom.js
For custom stylesheet, it typically has only
"require('../styles/custom.scss')" and is redundant.

* No need to extract vendor stylesheet to another asset
Extracting vendor stylesheet could be forgotten by developers who do not
use custom stylesheet.

Focus the submit button when boost modal is opened.

* Update zh-TW.json

* Update `search_results.total`

* Remove react-imageloader

* add eslint-disable-line

* improve image loading experience

* remove unneeded import

* use PureComponent

* Use componentWillMount instead of constructor

This prevents `next` state from being overridden on the loading *new* statuses.

* Add Catalan language

* Add Catalan language

* Update ca.json

* Update ca.json

* Update ca.json

* Update ca.json

* Update ca.json

* Update ca.json

* Update settings_helper.rb

* Update mastodon.js

* Update index.js

* Update application.rb

* Update ca.yml

* removed extra spaces at line 225

* Catalan translation update

added activerecord.ca.yml

* Update activerecord.ca.yml

Done

* Updated activerecord.ca.yml

* Catalan language updated

* Catalan language updated

* Catalan language updated

* Catalan language updated

* Catalan language updated

* Change PureComponent to ImmutablePureComponent

Change PureComponent to ImmutablePureComponent in AttachmentList.

* rm React.