* Add notification bell button, API endpoints and new relationship field
* Add notification type for subscriptions
* Add subscriptions to legacy notification filtering
* Update schemas
* Fix build
* Make rewrite static method into method of Notification class, fix getNotificationText
* Mastodon wording for subscriptions
* Perform manual isolation of display names etc. instead of relying on BidiFormatter.
Fixes#1921
* Make follow request notification header formatting more like other notifications
* Improve notifications fetching
- Only fetch notifications up to the latest fetched one
- Use timeline markers to avoid showing already seen notifications
* Apply some of the suggestions