message: Fix leaving space via other client leaving you in undefined-land
diff: @@ -608,6 +608,9 @@ export class SpaceStoreClass extends AsyncStoreWithClient<IState> {
  if (membership === "join" && room.roomId === RoomViewStore.getRoomId()) {
  // if the user was looking at the space and then joined: select that space
  this.setActiveSpace(room, false);
  + } else if (membership === "leave") {
  + // user's active space has gone away, go back to home
  + this.setActiveSpace(null, true);
  }
  };
  