message: Purify the components
diff: @@ -29,7 +29,7 @@ import * as humanize from "humanize";
  const INITIAL_ROOMS_SHOWN = 3; // Number of rooms to show at first
  const INCREMENT_ROOMS_SHOWN = 5; // Number of rooms to add when 'show more' is clicked
  -class DMRoomTile extends React.Component {
  +class DMRoomTile extends React.PureComponent {
  static propTypes = {
  member: PropTypes.object.isRequired,
  lastActiveTs: PropTypes.number,
  @@ -70,7 +70,7 @@ class DMRoomTile extends React.Component {
  }
  }
  -export default class DMInviteDialog extends React.Component {
  +export default class DMInviteDialog extends React.PureComponent {
  static propTypes = {
  // Takes an array of user IDs/emails to invite.
  onFinished: PropTypes.func.isRequired,
  