message: Fixed react-dom.js:18112 Warning
diff: @@ -55,7 +55,7 @@ export class SurveyQuestionComment extends SurveyQuestionElementBase {
  export class SurveyQuestionCommentItem extends ReactSurveyElement {
  componentWillMount() {
  - this.setState({ comment: this.props.question.comment });
  + this.setState({ comment: this.props.question.comment || "" });
  }
  render(): JSX.Element {
  let question = this.props.question;
  