Change preferences page into appearance, notifications, and other (#10977)

app/controllers/settings/preferences/appearance_controller.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class Settings::Preferences::AppearanceController < Settings::PreferencesController
+  private
+
+  def after_update_redirect_path
+    settings_preferences_appearance_path
+  end
+end