migrate animate appicon hover options dialog

prefs.js

@@ -166,6 +166,9 @@ const Preferences = class {
         this._builder.set_translation_domain(Me.metadata['gettext-domain']);
 
         if (window) {
+            // dialogs
+            this._builder.add_from_file(Me.path + '/ui/AnimateAppIconHoverOptions.ui');
+
             this._builder.add_from_file(Me.path + '/ui/SettingsPosition.ui');
             let pagePosition = this._builder.get_object('position');
             window.add(pagePosition);