message: pass membersLoaded state to TimelinePanel to force it to re-render
  ... once the members are loaded.
diff: @@ -91,13 +91,16 @@ module.exports = React.createClass({
  },
  getInitialState: function() {
  + const llMembers = MatrixClientPeg.get().hasLazyLoadMembersEnabled();
  return {
  room: null,
  roomId: null,
  roomLoading: true,
  peekLoading: false,
  shouldPeek: true,
  -
  + // used to trigger a rerender in TimelinePanel once the members are loaded,
  + // so RR are rendered again (now with the members available), ...
  + membersLoaded: !llMembers,
  // The event to be scrolled to initially
  initialEventId: null,
  // The offset in pixels from the event with which to scroll vertically
  @@ -593,7 +596,7 @@ module.exports = React.createClass({
  try {
  await room.loadMembersIfNeeded();
  if (!this.unmounted) {
  - this.forceUpdate();
  + this.setState({membersLoaded: true});
  }
  } catch(err) {
  const errorMessage = `Fetching room members for ${room.roomId} failed.` +
  @@ -1765,6 +1768,7 @@ module.exports = React.createClass({
  onReadMarkerUpdated={this._updateTopUnreadMessagesBar}
  showUrlPreview = {this.state.showUrlPreview}
  className="mx_RoomView_messagePanel"
  + membersLoaded={this.state.membersLoaded}
  />);
  let topUnreadMessagesBar = null;
  