This PR adds a new notification cleaning mode, super perfectly tuned for accessibility, and removes the previous notification cleaning functionality as it's now redundant.
* w.i.p. notif clearing mode
* Better CSS for selected notification and shorter text if Stretch is off
* wip for rebase ~
* all working in notif clearing mode, except the actual removal
* bulk delete route for piggo
* cleaning + refactor. endpoint gives 422 for some reason
* formatting
* use the right route
* fix broken destroy_multiple
* load more notifs after succ cleaning
* satisfy eslint
* Removed CSS for the old notif delete button
* Tabindex=0 is mandatory
In order to make it possible to tab to this element you must have tab index = 0. Removing this violates WCAG and makes it impossible to use the interface without good eyesight and a mouse. So nobody with certain mobility impairments, vision impairments, or brain injuries would be able to use this feature if you don't have tabindex=0
* Corrected aria-label
Previous label implied a different behavior from what actually happens
* aria role localization & made the overlay behave like a checkbox
* checkboxes css and better contrast
* color tuning for the notif overlay
* fanceh checkboxes etc and nice backgrounds
* SHUT UP TRAVIS
* Locale script now accepts overrides and new keys from glitch/locales
* Revert glitchsoc changes to mastodon/locales to prevent future merge conflicts
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