message: Update dropdownListModel.ts
  It appears that this instance of denySearch was missed when refactoring (https://github.com/surveyjs/survey-library/commit/290939a21e3c3c48385770739fc7b1d123326a52) took place.
diff: @@ -48,7 +48,7 @@ export class DropdownListModel extends Base {
  constructor(protected question: Question, protected onSelectionChanged?: (item: IAction, ...params: any[]) => void) {
  super();
  this.listModel = this.createListModel();
  - this.setSearchEnabled(this.question.denySearch);
  + this.setSearchEnabled(this.question.searchEnabled);
  this.createPopup();
  }
  