message: Fix console error onAfterRender panel in knockout
diff: @@ -35,7 +35,7 @@ export class QuestionRow extends QuestionRowModel {
  var el = SurveyElement.GetFirstNonTextElement(elements);
  if (!el) return;
  var element = <IElement>con;
  - if (element.isPanel) {
  + if (element.isPanel && this.panel.survey) {
  this.panel.survey.afterRenderPanel(con, el);
  } else {
  (<Question>element).afterRender(el);
  