message: fix the bug, showTimerPanelMode setter doesn't work correctly
diff: @@ -1777,7 +1777,7 @@ export class SurveyModel extends Base implements ISurvey, ISurveyData, ISurveyIm
  * @see onTimerPanelInfoText
  */
  public get showTimerPanelMode() : string { return this.getPropertyValue("showTimerPanelMode", "all"); }
  - public set showTimerPanelMode(val : string) { this.getPropertyValue("showTimerPanelMode", val); }
  + public set showTimerPanelMode(val : string) { this.setPropertyValue("showTimerPanelMode", val); }
  public get timerInfoText() : string {
  var options = {text: this.getTimerInfoText()};
  this.onTimerPanelInfoText.fire(this, options);
  