message: Add question property into MultipleTextItemModel
diff: @@ -60,6 +60,9 @@ export class MultipleTextItemModel extends Base
  public set name(val: string) {
  this.editor.name = val;
  }
  + public get question(): Question {
  + return <Question>(<any>this.data);
  + }
  public get editor(): QuestionTextModel {
  return this.editorValue;
  }
  