message: Fix EventTilePreview display names
  Because of we now need to
  additionally set rawDisplayName to properly fake our display name for an
  event.
diff: @@ -102,6 +102,7 @@ export default class EventTilePreview extends React.Component<IProps, IState> {
  // Fake it more
  event.sender = {
  name: this.props.displayName || this.props.userId,
  + rawDisplayName: this.props.displayName,
  userId: this.props.userId,
  getAvatarUrl: (..._) => {
  return Avatar.avatarUrlForUser(
  