feat(client/ts): port note_list

src/public/app/widgets/basic_widget.ts

@@ -193,7 +193,7 @@ export class TypedBasicWidget<T extends TypedComponent<any>> extends TypedCompon
      * Indicates if the widget is enabled. Widgets are enabled by default. Generally setting this to `false` will cause the widget not to be displayed, however it will still be available on the DOM but hidden.
      * @returns whether the widget is enabled.
      */
-    isEnabled() {
+    isEnabled(): boolean | null | undefined {
         return true;
     }