Fix #7659

Fix #7568

* Revert "Do not re-position scroll when loading more (inserting items from below) (#7344)"

This reverts commit 8c601b54.

* Revert "Prevent timeline from moving when cursor is hovering over it (fixes #7278) (#7327)"

This reverts commit 58852695.

* Mark currently selected privacy setting in privacy dropdown

* Prevent Enter keypresses from triggering dropdown display toggle twice

* Give focus to first/selected item of dropdown menus

* Implement keyboard navigation in privacy dropdown

* Implement keyboard navigation in generic dropdown menus

Use short instead of numeric month, display year when different year

E.g.: "Apr 4" instead of "4/4", "Apr 4, 2017" if different year

KeyboardEvent.key may be physical key name (Escape, Tab, etc.)
even in text composition and it causes hotkeys or suggestion selection.
So we need to check e.which or e.isComposing.

Checking e.which also allows us to avoid Esc key on compositionend in Safari.

Fix the hot key (j, k) does not function correctly when there is a pinned toot in account timeline. (#7202)

* Fix the hot key (j, k) does not function correctly when there is a pinned toot in account timeline.

* Fix typo

* Add custom attribute prefix

* Fix boosting own private toots.

* Run yarn manage:translations and update Japanese translations.

This fixes following cases which causes hotkey action accidentally:

* hitting Esc key to cancel text composition (mostly in CJK)

  Although events on cancelling composition are still heavily
  browser / input method dependent, but this implementation would
  covers current UI Events spec and some exceptions.

* hitting Esc key to close autocomplete suggestions

This PR changes to use keydown event instead of keyup event as well as other hotkeys.

Resolves #5550

* Adjust policy to allow boosting own private toots

* Add ability to reblog private toots from dropdown menu

* Update React.JS

* Use React's new lifecycles for scrollable lists

* Clean up dead code

* Make CodeClimate happy

* Fix: Switching between composing direct message and mention from menus

Previously clicking "direct message" followed by "mention" resulted in the composed status staying as "direct", along with weird spacing of items in the text area. This attempts to fix that.

* Fix: Add missing proptype check for onMention in Status component

* Add the ability to send a direct message to a user from the menu on Statuses

* Add space between "Embed" and "Mention" on expanded statuses menu

`navigator.share()` rejects Promise if user cancelled sharing, and it may
print it as an error on JavaScript console.

This patch ignores it and prints other errors on the console.

* Keep list of blocked domains

Might be overkill, but I'm trying to follow the same logic as for blocked users

* Add basic domain block UI

* Add the domain blocks UI to Getting Started

* Fix undefined URL in `fetchDomainBlocks`

* Update all known users' domain_blocking relationship instead of just one's

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

* Fix focal point modal

Fix #1258

Fix #6677

* 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

onScrollToBottom was a function to run instead of onScrollToTop and
onScroll when scrolling to the bottom. The behavior to prevent
onScrollToTop was inconvenient because the viewport can be at the bottom
and at the top at the same time if the viewport is larger than the
container.

onScrollToBottom was also called when the button to load more is clicked
on contray to the name suggests, which led notifications and
status_list_container components to mark the scrolled location is not at
the top mistakenly.

onLoadMore is a replacement for onScrollToBottom. It will be called
independently from onScrollToTop and onScroll.

* Improved media modal

ImageLoader: Impliment pinch zoom by CSS `transform: scale(X)`
ImageLoader: Impliment panning by CSS `overflow: scroll`
ImageLoader: Larger image
MediaModal: Larger close button
MediaModal: Close the modal by swiping vertically
MediaModal: Show/hide close button and right/left navigation on tapping image
MediaModal: Change the `pointer-event` CSS prpp to get more blank space to close the modal
ImageLoader: Zoom/reset zoom on double tap
MediaModal: disable vertical swiping while horizontally swiped
ImageLoader: prevent propagating touchmove event to MediaModal
MediaModal: Adjust size and potision of buttons
ImageLoader: Adjust scroll potision on pinch zoom

* Remove "swipe to close" and "double tap to zoom" features

* remove unused prop and functions

removed `onScroll` prop and `handleScroll` func in ImageLoader

* separate zoom functionary to ZoomableImage component

adjust styling of ImageLoader
add styling for ZoomableImage

* adjust size and potision of close button of media modal

* Fix for gif video

add `onClick` prop to ExtendedVideoPlayer
specify `onClick` prop to video tag for switching nav of `MediaModal`
add `.video-modal` class to scss to separate styling for `VideoModal`

* fix styling for centering

specify height of `ZoomableImage` by pixel
clean styling for `ImageLoader`

* fix lint errors

* small fix

* fixed designated parts

This is a functionality similar to one implemented in Pawoo:
https://github.com/pixiv/mastodon/commit/21a3c70f8083b1347d2b8420ed7001b78c2c9620

* Federate pinned statuses over ActivityPub

* Display pinned toots in web UI

Fix #6117

* Fix migration

* Fix tests

* Update outbox_serializer.rb

* Update remove_serializer.rb

* Update add_serializer.rb

* Update fetch_featured_collection_service.rb

* Responsively enforce 16:9 ratio on all media thumbnails in web UI

Also change video player behaviour to "contain" rather than
"cover" videos that don't fit the ratio, unlike images and GIFs,
it's expected that a video is shown fully.

* Fix spacing issues and remove floor

* Remove floor

* Add focus param to media API, center thumbnails on focus point

* Add UI for setting a focal point

* Improve focal point icon on upload item

* Use focal point in upload preview

* Add focalPoint property to ActivityPub

* Don't show focal point button for non-image attachments