message: Autojoin rooms when clicking the tombstone
  Fixes
diff: @@ -321,15 +321,22 @@ export default class MessageComposer extends React.Component {
  const createEvent = replacementRoom.currentState.getStateEvents('m.room.create', '');
  if (createEvent && createEvent.getId()) createEventId = createEvent.getId();
  }
  +
  + const viaServers = [this.state.tombstone.getSender().split(':').splice(1).join(':')];
  dis.dispatch({
  action: 'view_room',
  highlighted: true,
  event_id: createEventId,
  room_id: replacementRoomId,
  + auto_join: true,
  // Try to join via the server that sent the event. This converts @something:example.org
  // into a server domain by splitting on colons and ignoring the first entry ("@something").
  - via_servers: [this.state.tombstone.getSender().split(':').splice(1).join(':')],
  + via_servers: viaServers,
  + opts: {
  + // These are passed down to the js-sdk's /join call
  + viaServers: viaServers,
  + },
  });
  }
  