Merge commit '40ba6e119b7457161fd43b449875d0fb9d473c1a' into glitch-soc/merge-upstream

Conflicts:
- `app/controllers/concerns/web_app_controller_concern.rb`:
  Upstream changed the order of Action Controller filters for web app
  controllers.
  Glitch-soc has an extra filter due to its theming system.
  Changed the order accordingly.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Conflict due to an extra newline in glitch-soc.
  Removed that newline and applied upstream's changes.

spec/requests/cache_spec.rb

@@ -30,6 +30,7 @@ module TestEndpoints
     /directory
     /@alice
     /@alice/110224538612341312
+    /deck/home
   ).freeze
 
   # Endpoints that should be cachable when accessed anonymously but have a Vary