message: Work for fix string-viewer
diff: @@ -24,6 +24,6 @@ export class StringViewerComponent implements OnChanges, OnDestroy {
  _locString.onChanged = () => { this.content = _locString.renderedHtml; this.changeDetectorRef.detectChanges(); };
  }
  ngOnDestroy(): void {
  - this.model.onChanged = undefined;
  + this.model.onChanged = () => {};
  }
  }
  \ No newline at end of file
  