message: Navigate to the upgraded room's create event where possible
  Fixes
diff: @@ -281,9 +281,17 @@ export default class MessageComposer extends React.Component {
  ev.preventDefault();
  const replacementRoomId = this.state.tombstone.getContent()['replacement_room'];
  + const replacementRoom = MatrixClientPeg.get().getRoom(replacementRoomId);
  + let createEventId = null;
  + if (replacementRoom) {
  + const createEvent = replacementRoom.currentState.getStateEvents('m.room.create', '');
  + if (createEvent && createEvent.getId()) createEventId = createEvent.getId();
  + }
  +
  this.props.roomViewStore.getDispatcher().dispatch({
  action: 'view_room',
  highlighted: true,
  + event_id: createEventId,
  room_id: replacementRoomId,
  });
  }
  