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

Conflicts:
- `README.md`:
  Upstream added a link to the roadmap, but we have a completely different README.
  Kept ours.
- `app/models/media_attachment.rb`:
  Upstream upped media attachment limits.
  Updated the default according to upstream's.
- `db/migrate/20180831171112_create_bookmarks.rb`:
  Upstream changed the migration compatibility level.
  Did so too.
- `config/initializers/content_security_policy.rb`:
  Upstream refactored this file but we have a different version.
  Kept our version.
- `app/controllers/settings/preferences_controller.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  The file does not directly references individual settings anymore.
  Applied upstream changes.
- `app/lib/user_settings_decorator.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  The file got removed entirely.
  Removed it as well.
- `app/models/user.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  References to individual settings have been removed from the file.
  Removed them as well.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `app/views/settings/preferences/notifications/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `app/views/settings/preferences/other/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `config/settings.yml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  In particular, upstream removed user-specific and unused settings.
  Did the same in glitch-soc.
- `spec/controllers/application_controller_spec.rb`:
  Conflicts due to glitch-soc's theming system.
  Mostly kept our version, as upstream messed up the tests.

app/controllers/settings/preferences_controller.rb

@@ -4,8 +4,6 @@ class Settings::PreferencesController < Settings::BaseController
   def show; end
 
   def update
-    user_settings.update(user_settings_params.to_h)
-
     if current_user.update(user_params)
       I18n.locale = current_user.locale
       redirect_to after_update_redirect_path, notice: I18n.t('generic.changes_saved_msg')
@@ -20,46 +18,7 @@ class Settings::PreferencesController < Settings::BaseController
     settings_preferences_path
   end
 
-  def user_settings
-    UserSettingsDecorator.new(current_user)
-  end
-
   def user_params
-    params.require(:user).permit(
-      :locale,
-      chosen_languages: []
-    )
-  end
-
-  def user_settings_params
-    params.require(:user).permit(
-      :setting_default_privacy,
-      :setting_default_sensitive,
-      :setting_default_language,
-      :setting_unfollow_modal,
-      :setting_boost_modal,
-      :setting_favourite_modal,
-      :setting_delete_modal,
-      :setting_auto_play_gif,
-      :setting_display_media,
-      :setting_expand_spoilers,
-      :setting_reduce_motion,
-      :setting_disable_swiping,
-      :setting_system_font_ui,
-      :setting_system_emoji_font,
-      :setting_noindex,
-      :setting_hide_followers_count,
-      :setting_aggregate_reblogs,
-      :setting_show_application,
-      :setting_advanced_layout,
-      :setting_default_content_type,
-      :setting_use_blurhash,
-      :setting_use_pending_items,
-      :setting_trends,
-      :setting_crop_images,
-      :setting_always_send_emails,
-      notification_emails: %i(follow follow_request reblog favourite mention report pending_account trending_tag trending_link trending_status appeal),
-      interactions: %i(must_be_follower must_be_following must_be_following_dm)
-    )
+    params.require(:user).permit(:locale, chosen_languages: [], settings_attributes: UserSettings.keys)
   end
 end