Add option to disable blurhash previews (#11188)

* Add option to disable blurhash previews

* Update option text

* Change options order

app/controllers/settings/preferences_controller.rb

@@ -54,6 +54,7 @@ class Settings::PreferencesController < Settings::BaseController
       :setting_aggregate_reblogs,
       :setting_show_application,
       :setting_advanced_layout,
+      :setting_use_blurhash,
       notification_emails: %i(follow follow_request reblog favourite mention digest report pending_account),
       interactions: %i(must_be_follower must_be_following must_be_following_dm)
     )