* Change old moderation strikes to be displayed in a separate page

Fixes #17552

This changes the moderation strikes displayed on `/auth/edit` to be those from
the past 3 months, and make all moderation strikes targeting the current user
available in `/disputes`.

* Add short description of what the strikes page is for

* Move link to list of strikes to “Account status” instead of navigation item

* Normalize i18n file

* Fix layout and styling of strikes link

* Revert highlights_on regexp

* Reintroduce account status summary

- this way, “Account status” is never empty
- account status is not necessarily bound to strikes, or recent strikes

* Display an error when an appeal could not be submitted

* Do not offer users to appeal old strikes

* Fix 500 error when trying to appeal a strike that is too old

* Avoid using an extra translatable string

* Add appeals

* Add ability to reject appeals and ability to browse pending appeals in admin UI

* Add strikes to account page in settings

* Various fixes and improvements

- Add separate notification setting for appeals, separate from reports
- Fix style of links in report/strike header
- Change approving an appeal to not restore statuses (due to federation complexities)
- Change style of successfully appealed strikes on account settings page
- Change account settings page to only show unappealed or recently appealed strikes

* Change appealed_at to overruled_at

* Fix missing method error