message: re-apply formatting when editor is closed
diff: @@ -131,8 +131,9 @@ module.exports = React.createClass({
  componentDidUpdate: function(prevProps) {
  if (!this.props.isEditing) {
  + const stoppedEditing = prevProps.isEditing && !this.props.isEditing;
  const messageWasEdited = prevProps.replacingEventId !== this.props.replacingEventId;
  - if (messageWasEdited) {
  + if (messageWasEdited || stoppedEditing) {
  this._applyFormatting();
  }
  this.calculateUrlPreview();
  