Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `app/services/remove_status_service.rb`:
  Conflict caused by us having a distinc Direct timeline.
  Ported upstream changes.
- `app/javascript/mastodon/features/compose/components/compose_form.js`:
  Conflict between glitch-soc's variable character limit and upstream
  refactoring that part of the code.
  Ported upstream changes.

app/helpers/application_helper.rb

@@ -7,6 +7,13 @@ module ApplicationHelper
     follow
   ).freeze
 
+  RTL_LOCALES = %i(
+    ar
+    fa
+    he
+    ku
+  ).freeze
+
   def active_nav_class(*paths)
     paths.any? { |path| current_page?(path) } ? 'active' : ''
   end
@@ -44,7 +51,7 @@ module ApplicationHelper
   end
 
   def locale_direction
-    if [:ar, :fa, :he].include?(I18n.locale)
+    if RTL_LOCALES.include?(I18n.locale)
       'rtl'
     else
       'ltr'