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

Conflicts:
- app/controllers/settings/preferences_controller.rb
- app/lib/user_settings_decorator.rb
- app/models/user.rb

Conflicts due to the addition of a new preference upstream,
“advanced layout”.

app/serializers/initial_state_serializer.rb

@@ -46,6 +46,7 @@ class InitialStateSerializer < ActiveModel::Serializer
       store[:display_media]   = object.current_account.user.setting_display_media
       store[:expand_spoilers] = object.current_account.user.setting_expand_spoilers
       store[:reduce_motion]   = object.current_account.user.setting_reduce_motion
+      store[:advanced_layout] = object.current_account.user.setting_advanced_layout
       store[:is_staff]        = object.current_account.user.staff?
       store[:default_content_type] = object.current_account.user.setting_default_content_type
     end