Correcting language name arabic = العربية

There was still a reference to "private posts" and the phrasing of unlisted in contrast to the others now made it seem strangely more private.

* Add coverage for remote_follow#new

* Fix reference to authorize_follows/card partial

In #2505, the authorize_follow views were renamed to
authorize_follows. This change was not applied in the show view
of admin/reports, which causes a 500 when reports are viewed.

* Update English translation file for JavaScript

* Update Japanese translation for JavaScript

* chmod -x assets.rb

* chmod -x assets/fonts

* raname extname from jpeg to jpg

* Fix Doorkeeper error

* use Doorkeeper::OAuth::Scopes.from_string

* Another (less urgent) update

* Another (less urgent) update

* Dutch strings: consistency:  let's use 'voorkeuren' as a subset of 'instellingen'

* Instead of parsing shared status contents verbatim, make roundtrip
to purported original URL. Confirm that the "original" URL is from the
same domain as the author it claims to be from.

* Fix obvious typo, add comment

* Use URI look-up first

* Add test, update Goldfinger dependency to make less useless HTTP requests per Webfinger lookup

* Update and fix

* Update and fix Dutch strings

* Added different title for dev

* Changed indentation

* OEmbed support for PreviewCard

* Improve ProviderDiscovery code failure treatment

* Do not crawl links if there is a content warning, since those
don't display a link card anyway

* Reset db schema

* Fresh migrate

* Fix rubocop style issues
Fix #1681 - return existing access token when applicable instead of creating new

* Fix test

* Extract http client to helper

* Improve oembed controller

There are multiple messages missing in en.jsx.
It is very troublesome when translating other languages.

from #1754, should close out #1394

* Fix syntax error

* Remove two_factor_auth.warning (appears obsolete)

* Add missing strings in ru.yml

A lot of new strings translated, especially for the newly added admin section

* Update Russian translation

* Fix merge conflicts

Redid Works by @rkarabut

Also cache node_module and yarn cache in Travis test process.
Improves speed for Travis tests.

* Add coverage for domain block service with silence

* Get rid of warning about find_each and order

* Move domain_block to attr_reader

* Move optional clear_media into silence_accounts method

* Use blocked_domain method to reduce passed vars

* Extract blocked_domain_accounts method to find accounts on the domain

* Extract media_from_blocked_domain method to find relevant attachments

* Separate destruction of account images and account attachments

Now perfectly similar to the English one.

follow up #1309 & #2279

* Set a dev specific favicon

* Consistent spacing

* Add trailing slash for consistency

* Update to remove interpolation

* Don't toot request with only blank characters

* Enable toot button if no text

Adding more missing strings.

* Update Japanese translation for activitypub and authorized followers

* Fixed Japanese translation by review

* Fixes #1985

- add migration AddMediaAttachmentMeta, which add meta field to media_attachments
- before saving attachment, set file meta if needed
- add meta in api

* add spec

* align the “size” format for image and video

* fix code climate

* fixes media_attachment_spec.rb

ref #2162 and fix #2460