message: matrix collapse/expand disable in design mode
  ref surveyjs/survey-creator#2317
diff: @@ -222,6 +222,7 @@ implements ISurveyData, ISurveyImpl, ILocalizableOwner {
  MatrixDropdownRowModelBase.RowVariableName, !!data ? data.getParentTextProcessor() : null
  );
  this.showHideDetailPanelClick = () => {
  + if (this.getSurvey().isDesignMode) return true;
  this.showHideDetailPanel();
  };
  this.idValue = MatrixDropdownRowModelBase.getId();
  