message: Explain roomId workaround
diff: @@ -283,6 +283,15 @@ module.exports = React.createClass({
  }
  },
  + _getRoomId() {
  + // According to `_onRoomViewStoreUpdate`, `state.roomId` can be null
  + // if we have a room alias we haven't resolved yet. To work around this,
  + // first we'll try the room object if it's there, and then fallback to
  + // the bare room ID. (We may want to update `state.roomId` after
  + // resolving aliases, so we could always trust it.)
  + return this.state.room ? this.state.room.roomId : this.state.roomId;
  + },
  +
  _onWidgetEchoStoreUpdate: function() {
  this.setState({
  showApps: this._shouldShowApps(this.state.room),
  @@ -882,7 +891,7 @@ module.exports = React.createClass({
  action: 'do_after_sync_prepared',
  deferred_action: {
  action: 'view_room',
  - room_id: this.state.room ? this.state.room.roomId : this.state.roomId,
  + room_id: this._getRoomId(),
  },
  });
  