pretty quick fix, and with the 1 week expiration i don't think we need to be too worried about the existing files

closes #6798

This will prevent, for example, `rake mastodon:redownload_avatars` from crashing when an instance is no longer responding to connection attempts, instead silently continuing as expected.

Apply "margin: 0 auto;" at line 443 to fix issue #6787

This is the first step to make Mastodon work offline. It is also required
by Chromium to trigger Web Manifest automated install prompt.

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Spanish)

Currently translated at 99.6% (579 of 581 strings)

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

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (French)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

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

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Indonesian)

Currently translated at 94.6% (71 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/id/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ar/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 75.5% (439 of 581 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 76.2% (443 of 581 strings)

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

* Translated using Weblate (Russian)

Currently translated at 95.8% (557 of 581 strings)

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

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

Icon showing the state may be confusing. (does the slahed eye icon mean
the state that it is sensitive, or to mark it as sensitive?) Moreover, it
may not help for blind people.

The title will give the precise representation of the current state.

The title will give the precise representation of the current state. It
would be helpful for blind people.

avoid using JS to set height of ReactSwipeableViews component
reduce max-height of <img/> to 80% to avoid the screen covered by image

* Translated using Weblate (Japanese)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Finnish)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Finnish)

Currently translated at 25.1% (146 of 581 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 91.2% (530 of 581 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 67.6% (393 of 581 strings)

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

* Translated using Weblate (Swedish)

Currently translated at 100.0% (58 of 58 strings)

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

* Translated using Weblate (Swedish)

Currently translated at 100.0% (581 of 581 strings)

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

* Translated using Weblate (Finnish)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Finnish)

Currently translated at 92.0% (69 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/fi/

* Translated using Weblate (Finnish)

Currently translated at 60.3% (35 of 58 strings)

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

* Translated using Weblate (Swedish)

Currently translated at 100.0% (75 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/sv/

* Translated using Weblate (Swedish)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 68.3% (397 of 581 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 99.2% (274 of 276 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 73.8% (429 of 581 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 91.2% (530 of 581 strings)

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

* bundle exec i18n-tasks normalize && yarn manage:translations

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

* Use object-position with object-fit instead of JS top/left

* Fix focal point modal

Fix #1258

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

* Translated using Weblate (Galician)

Currently translated at 100.0% (580 of 580 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (580 of 580 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 99.8% (579 of 580 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (581 of 581 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (French)

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (German)

Currently translated at 99.3% (577 of 581 strings)

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

* Translated using Weblate (German)

Currently translated at 99.3% (577 of 581 strings)

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

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pt_BR/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (German)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Catalan)

Currently translated at 100.0% (581 of 581 strings)

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

* Translated using Weblate (French)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (French)

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Polish)

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (Esperanto)

Currently translated at 100.0% (581 of 581 strings)

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

* Translated using Weblate (Esperanto)

Currently translated at 100.0% (581 of 581 strings)

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

* Translated using Weblate (Esperanto)

Currently translated at 100.0% (276 of 276 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 90.3% (525 of 581 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 99.8% (580 of 581 strings)

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

* Translated using Weblate (Galician)

Currently translated at 100.0% (581 of 581 strings)

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

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

- Add missing meta description to profiles
- Add canonical rel link to landing page
- Remove linebreaks from title tags
- Add username to profile title
- Add toots/following/followers to profile description tags
- Add next/prev rel links to profiles
- Do not index follower/following variants of profiles

Fix #6670

* Improve styling of closed registrations message, rename button

"Sign up on another server"

Fix #6683

* Adjust styling of closed registrations message

Fix #6677

Media attachments are part of the association cache of statuses,
since they are presumed to be immutable. Unless this cache is
cleared manually, the statuses will continue to look like they
have media embedded.

* Translated using Weblate (French)

Currently translated at 99.8% (578 of 579 strings)

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

* Translated using Weblate (French)

Currently translated at 99.8% (578 of 579 strings)

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

* Translated using Weblate (French)

Currently translated at 99.8% (578 of 579 strings)

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

* Translated using Weblate (French)

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 85.3% (494 of 579 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 99.8% (578 of 579 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 99.2% (273 of 275 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (275 of 275 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 66.8% (387 of 579 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 93.1% (54 of 58 strings)

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

* Translated using Weblate (French)

Currently translated at 99.8% (578 of 579 strings)

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

* Translated using Weblate (Slovak)

Currently translated at 87.7% (508 of 579 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (275 of 275 strings)

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

* bundle exec i18n-tasks normalize && yarn manage:translations

* Remove ar.simple_form.hints.defaults.{display_name,note}

* Rescue when there's no extension in the remotable
Sometimes the remotable is pointing to a directory with no file
extension. Maybe it should not be expecting to identify based on
extensions to begin with, but since it's the case, it should be ready
for it.

* Fix codeclimate issue

* Check if filename is nil instead of rescueing exception
Suggestion made in the PR

* Avoid concatenation issue if filename is nil
If filename is nil, extname was undefined

* Invert condition
Address PR comments

* fix validation error (media only status)

* Incorporating review suggestions

* Reflect similar fix to OStatus side

* Fix not to include media in transaction

* Restore the limit of the number of media

* Fix not to return nil

* Remove pointer events on the entire UI when a dropdown menu is open

This prevents operations to change the location of the menu such as
scrolling.

* Fix mistake from merge

* Changes the headings' rank of the security settings section

This commit changes the existing headings' rank of the security settings section from level 6 to level 4.

* Renames the auth.change_password string into auth.security

The "Security" preferences' section used to be called "Change password". When it was renamed, the string name wasn't changed.
This commits changes auth.change_password to auth.security.

* Adds a heading to the password change form

There was previously no heading for the part of the "Security" page that contain the password change form.
This commit adds a rank 4 heading to this section and reintroduces an "auth.change_password" string to be used inside it.

* Removes useless HR elements

The various sections of the "Security" settings page were previously separated by HR elements.
Now that there is proper headings, they're not required anymore.

* Updates CSS

This commit updates CSS in such a way that the same style is applied to all the H4 elements of the settings.

* Correct a mistake

A character went missing on one of the previous commits, broking the CSS.
This new commit fixes it.

UI component used to toggle isComposing state by directly manipulating the
DOM element to avoid the expensive rendering.

However, it is hacky, and is not effective for other states. Instead,
this change makes the rendering cheaper by extracting the huge columns
area.