message: Enable comment for the file question type
diff: @@ -382,10 +382,19 @@ export class QuestionFileModel extends Question {
  }
  return questionPlainData;
  }
  + public supportComment(): boolean {
  + return true;
  + }
  }
  Serializer.addClass(
  "file",
  [
  + { name: "hasComment:boolean", layout: "row" },
  + {
  + name: "commentText",
  + serializationProperty: "locCommentText",
  + layout: "row"
  + },
  { name: "showPreview:boolean", default: true },
  "allowMultiple:boolean",
  { name: "allowImagesPreview:boolean", default: true },
  