Follow-up to #6124

Add a light theme by @Sylvhem

* Add confirmations_controller#resend

* Add tests for confirmations_controller#resend

* Add translations

* Port travis_retry for CI

* Add license

Fix #7367

* Improve design of account statuses admin UI (consistent with reports)

* Make account moderation notes look consistent with report notes

* i18n-tasks remove-unused

* Fix code style issues

* Fix tests

Fix #7144

Port ba917e15f6 to glitch-soc

Port 74dae9458d and related to glitch-soc

Fix #7303

* Fix handling of malformed ActivityPub payloads when URIs are nil

* Gracefully handle JSON-LD canonicalization failures

Port the SCSS changes from cb74c0cfe4 to glitch-soc

Port SCSS changes from 5acd5315f2 to glitch-soc

Port 8c601b54cc to glitch-soc

Port 58852695c8 to glitch-soc

* Prevent Enter keypresses from triggering dropdown display toggle twice
* Give focus to first/selected item of dropdown menus
* Implement keyboard navigation in generic dropdown menus

Partial port from ef7d64c801 to glitch-soc

Port ad5d3134e4 to glitch-soc

Fix #7335

* Store home feeds for 7 days instead of 14

Reduces workload for status fan-out to active followers

* Fix test for user model

* 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

Conflicts:
 	app/controllers/follower_accounts_controller.rb
 	app/controllers/following_accounts_controller.rb
    	db/schema.rb

Same URI passed between follow request and follow, since they are
the same thing in ActivityPub. Local URIs are generated during
creation using UUIDs and are passed to serializers.

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

Conflicts:
 	CONTRIBUTING.md

“Enable” high contrast theme

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

Conflicts:
 	Gemfile.lock

Fix #6994