message: Hide replaced rooms
  By using new getVisibleRooms() in js-sdk
diff: @@ -97,7 +97,7 @@ module.exports = React.createClass({
  };
  // All rooms that should be kept in the room list when filtering.
  // By default, show all rooms.
  - this._visibleRooms = MatrixClientPeg.get().getRooms();
  + this._visibleRooms = MatrixClientPeg.get().getVisibleRooms();
  // Listen to updates to group data. RoomList cares about members and rooms in order
  // to filter the room list when group tags are selected.
  @@ -302,7 +302,7 @@ module.exports = React.createClass({
  this._visibleRooms = Array.from(roomSet);
  } else {
  // Show all rooms
  - this._visibleRooms = MatrixClientPeg.get().getRooms();
  + this._visibleRooms = MatrixClientPeg.get().getVisibleRooms();
  }
  this._delayedRefreshRoomList();
  },
  