message: Fix componentDidMount return value for action-bar component in React
diff: @@ -30,7 +30,7 @@ export class SurveyActionBar extends SurveyElementBase<IActionBarProps, any> {
  }
  componentDidMount() {
  super.componentDidMount();
  - if (!this.hasItems) return null;
  + if (!this.hasItems) return;
  const container: HTMLDivElement = this.rootRef.current;
  this.manager = new ResponsivityManager(
  container,
  