message: don't apply formatting to body when showing editor in TextualBody
  it throws
diff: @@ -89,7 +89,9 @@ module.exports = React.createClass({
  componentDidMount: function() {
  this._unmounted = false;
  + if (!this.props.isEditing) {
  this._applyFormatting();
  + }
  },
  _applyFormatting() {
  @@ -128,11 +130,13 @@ module.exports = React.createClass({
  },
  componentDidUpdate: function(prevProps) {
  + if (!this.props.isEditing) {
  const messageWasEdited = prevProps.replacingEventId !== this.props.replacingEventId;
  if (messageWasEdited) {
  this._applyFormatting();
  }
  this.calculateUrlPreview();
  + }
  },
  componentWillUnmount: function() {
  