message: Added processing isDesignMode for progress buttons
diff: @@ -14,6 +14,7 @@ export class SurveyProgressButtonsModel {
  return elementCss;
  }
  public clickListElement(visibleIndex: number): void {
  + if (this.survey.isDesignMode) return;
  if (visibleIndex < this.survey.currentPageNo) {
  this.survey.currentPageNo = visibleIndex;
  }
  