Resolve #3199

Fix the aspect ratio of animated GIF whose background is transparent.

wrong character, sorry about that~

Translation for https://github.com/tootsuite/mastodon/pull/4523

Neutral form used.

Salutation mailer + invalid reset link.

The feature to pin column could hide the rightmost column, which is
specified with children property of ColumnsArea.

The user is likely to see the column when the property changed, so scroll
the area in such cases.

System default libiconv of Alpine Linux only supports some charset (e.g. UTF-8).
Therefore, the preview card of the page which is not UTF-8 will be broken in the Docker environment.

Using GNU libiconv!

* i18n: Update Polish translation

* Update Polish translation

fix style

"©"削除処理をemojione_lightに移動

Fixes #4496

Use `text-align: unset` instead of `text-align: start` which Edge doesn't support for now.

Also remove default margin on Safari.

* Update Japanese Translation

* preserve "Unfortunately"("残念ながら")

preserve "Unfortunately"("残念ながら")

Previous and Next buttons

* fix(web_push_notifications): Send grouping title in welcome notification

* fix(web_push_notifications): Read message from last notification

Fix builds that fail on Heroku.

* Re-add outline

* respect default of web browser

* i18n: update Persian translation

* i18n: fix quotes

URI.extract is too strong, not limited to URLs, matched real text.
Same issue was present in language detector.

* fix(media_modal): Keyboard navigation

* fix(column_back_button): Use native button

* fix(media_gallery): Keyboard navigation

* fix(status_content): Make CW content focusable

* Remove outline from focused toot

* change style

Empty a element is created when there is no business e-mail input.

* Set contact address as mailto link

To be able to copy long email address

* Set style for mailto link