message: Fix soft crash when editing message
  Fixes
diff: @@ -94,7 +94,8 @@ export default class BasicMessageEditor extends React.Component {
  this._emoticonSettingHandle = null;
  }
  - componentDidUpdate(prevProps) {
  + // TODO: [REACT-WARNING] Move into better lifecycle position
  + UNSAFE_componentWillUpdate(prevProps) {
  if (this.props.placeholder !== prevProps.placeholder && this.props.placeholder) {
  const {isEmpty} = this.props.model;
  if (isEmpty) {
  