message: Default the topic to an empty string otherwise React gets mad
diff: @@ -38,7 +38,7 @@ export default class RoomProfileSettings extends React.Component {
  let avatarUrl = avatarEvent && avatarEvent.getContent() ? avatarEvent.getContent()["url"] : null;
  if (avatarUrl) avatarUrl = client.mxcUrlToHttp(avatarUrl, 96, 96, 'crop', false);
  const topicEvent = room.currentState.getStateEvents("m.room.topic", "");
  - const topic = topicEvent && topicEvent.getContent() ? topicEvent.getContent()['topic'] : null;
  + const topic = topicEvent && topicEvent.getContent() ? topicEvent.getContent()['topic'] : '';
  this.state = {
  originalDisplayName: room.name,
  displayName: room.name,
  