message: fix(modal): add null check in focusOtherModal()
  closes
diff: @@ -371,9 +371,8 @@ export class ModalDirective implements OnDestroy, OnInit {
  // }
  protected focusOtherModal() {
  - const otherOpenedModals = this._element.nativeElement.parentElement.querySelectorAll(
  - '.in[bsModal]'
  - );
  + if (this._element.nativeElement.parentElement == null) return;
  + const otherOpenedModals = this._element.nativeElement.parentElement.querySelectorAll('.in[bsModal]');
  if (!otherOpenedModals.length) {
  return;
  }
  