Fix #340

* Use Contact User as Relay, Report, Subscribe.

* Use Account.representative to fetch contact user.

* Use find_local.

* No reason to use Account.representative in subscribe_service.

* Don't required representative!

* Fallback is included in Account.representative method.

Fix #4419

Fix #9697

* 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]

Regression from #9700

* Add specs for UnreservedUsernameValidator

* Use instance variable

- Reduce time-to-digest from 20 to 7 days
- Fetch mentions starting from +1 day since last login
- Fix case when last login is more recent than last e-mail
- Do not render all mentions, only 40, but show number in subject
- Do not send digest to moved accounts
- Do send digest to silenced accounts

* Ensure blocked user unfollows blocker if Block/Undo Block are processed out of order

* Add specs for Block causing unfollow and for out-of-order Block + Undo

Fix #6893
Fix #9268

Revert #9423. Issues with line breaks / clutter.

* Update react-* to v16.7.0

* Upgrade react-hotkeys to v1.1.4

* Update react-intl to v2.7.2

* Update react-select to v2.2.0

* Update react-swipeable-views to v0.13.0

* Upgrade react-textarea-autosize to v7.1.0

* Upgrade redux to v4.0.1

* Upgrade reselect to v4.0.0

* Update raf to v3.4.1

* Update enzyme to v3.8.0

* Update rails-ujs to v5.2.2

* Update axios to v0.18.0

* Update http-link-header to v1.0.2

* Update rellax to v1.7.1

* Update intersection-observer to v0.5.1

* Update stringz to v1.0.0

* Upgrade babel-eslint to v10.0.1

* Update @babel/* to v7.2.x

* Update babel-plugin-react-intl to v3.0.1

* Update babel-plugin-transform-react-remove-prop-types to v0.4.21

* Upgrade dotenv to v6.2.0

* Update express to v4.16.4

* Update webpack to v4.28.3

* Upgrade autoprefixer to v9.4.3

* Update babel-loader to v8.0.4

* Upgrade css-loader to v2.1.0

* Upgrade file-loader to v3.0.1

* Update marky to v1.2.1

* Update mini-css-extract-plugin to v0.5.0

* Update offline-plugin to v5.0.6

* Update style-loader to v0.23.1

* Update eslint-plugin-jsx-a11y to v6.1.2

* yarn upgrade

* fix

* Replace webpack-manifest-plugin to webpack-assets-manifest

* Replace node-zopfli to @gfz/zopfli

* Remove monkey-patch for http-link-header

Fix #9365

* Skip full text search if failed

* Move rescue block to "perform_statuses_search!"

Avoids possible misleading delay before redirection during which the
composer would be cleared and redrawn.

* Do not LDS-sign Follow, Accept, Reject, Undo, Block

* Do not use LDS for Create activities of private toots

* Minor cleanup

* Ignore unsigned activities instead of misattributing them

* Use status.distributable? instead of querying visibility directly

* Add specs for BlackListedEmailValidator

* Use instance variable

In order to implement tests easier, `#select_tags` created.

* Add pending specs of StatusLengthValidator

* Use instance variable

* Add local followers page to admin account UI

For moderation, I often find myself wondering who, locally, is following
a remote user. Currently, to see this, I have to go back to the web UI,
paste in their full handle, click their profile, and go to the
"Followers" tab (plus, this information is incidental, and if mastodon
ever decides to resolve all of the follower information, there will be
no place local followers are shown). This PR adds a new page which is
accessible via the "following" count on the admin's account view
page, which shows the local followers. (It has filter parameters for
account location to indicate that only local followers are shown, and
leave room for expansion if mastodon ever decides to store the entire
remote follow list).

* Normalize en.yml

* Translated using Weblate (Occitan)

Currently translated at 99.7% (715 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/oc/

* Translated using Weblate (Occitan)

Currently translated at 100.0% (93 of 93 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/oc/

* Translated using Weblate (Greek)

Currently translated at 99.7% (715 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/el/

* Translated using Weblate (Czech)

Currently translated at 99.9% (716 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/cs/

* Translated using Weblate (Czech)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/cs/

* Translated using Weblate (French)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fr/

* Translated using Weblate (Dutch)

Currently translated at 100,0% (717 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/nl/

* Translated using Weblate (French)

Currently translated at 99.9% (716 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/fr/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Slovak)

Currently translated at 99.7% (715 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Korean)

Currently translated at 100.0% (717 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ko/

* Translated using Weblate (Arabic)

Currently translated at 97.5% (699 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Greek)

Currently translated at 93.8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/el/

* Translated using Weblate (Corsican)

Currently translated at 93.8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/co/

* Translated using Weblate (Arabic)

Currently translated at 98.6% (349 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ar/

* Translated using Weblate (Chinese (Simplified))

Currently translated at 78.2% (277 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/zh_Hans/

* Translated using Weblate (Basque)

Currently translated at 93.8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/eu/

* Translated using Weblate (Dutch)

Currently translated at 93,8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Galician)

Currently translated at 92,9% (329 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/gl/

* Translated using Weblate (Greek)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/el/

* Translated using Weblate (Galician)

Currently translated at 99.9% (716 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/gl/

* Translated using Weblate (Galician)

Currently translated at 100,0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/gl/

* Translated using Weblate (Corsican)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/co/

* Translated using Weblate (Korean)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ko/

* Translated using Weblate (Tamil)

Currently translated at 14.4% (51 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ta/

* Translated using Weblate (Russian)

Currently translated at 85.6% (303 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ru/

* Translated using Weblate (Italian)

Currently translated at 93.8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/it/

* Translated using Weblate (Occitan)

Currently translated at 93.8% (332 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/oc/

* Translated using Weblate (Spanish)

Currently translated at 88.1% (312 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (German)

Currently translated at 93.5% (331 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/de/

* Translated using Weblate (Hungarian)

Currently translated at 63.0% (223 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/hu/

* Translated using Weblate (Portuguese)

Currently translated at 65.0% (230 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt/

* Translated using Weblate (Hebrew)

Currently translated at 61.9% (219 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/he/

* Translated using Weblate (Chinese (Traditional))

Currently translated at 92.9% (329 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/zh_Hant/

* Translated using Weblate (Dutch)

Currently translated at 94.9% (336 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (93 of 93 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/sk/

* Translated using Weblate (Corsican)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/co/

* Translated using Weblate (Dutch)

Currently translated at 100,0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Arabic)

Currently translated at 97.4% (698 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (German)

Currently translated at 100,0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/de/

* Added translation using Weblate (Hindi)

* Translated using Weblate (Corsican)

Currently translated at 99.9% (716 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/co/

* Translated using Weblate (French)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fr/

* Translated using Weblate (Esperanto)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/eo/

* Translated using Weblate (German)

Currently translated at 99.9% (716 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/de/

* Translated using Weblate (Esperanto)

Currently translated at 100.0% (354 of 354 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/eo/

* Translated using Weblate (Esperanto)

Currently translated at 98.3% (705 of 717 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/eo/

* Translated using Weblate (French)

Currently translated at 100.0% (93 of 93 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/fr/

* Translated using Weblate (Polish)

Currently translated at 90.3% (84 of 93 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/pl/

* Normalize translations

* Add missing plurals, remove unused translations

Fix #9606

* Rename "crop" to "change preview" (tootsuite#9616)

* Rename "crop" to "change preview" (tootsuite#9616)

* Rename "crop" to "change preview" (tootsuite#9616)

Fix regression from 3c033c4352

* Add REST API for creating an account

The method is available to apps with a token obtained via the client
credentials grant. It creates a user and account records, as well as
an access token for the app that initiated the request. The user is
unconfirmed, and an e-mail is sent as usual.

The method returns the access token, which the app should save for
later. The REST API is not available to users with unconfirmed
accounts, so the app must be smart to wait for the user to click a
link in their e-mail inbox.

The method is rate-limited by IP to 5 requests per 30 minutes.

* Redirect users back to app from confirmation if they were created with an app

* Add tests

* Return 403 on the method if registrations are not open

* Require agreement param to be true in the API when creating an account

Fixes #9580