do not trigger computer player when game is restored on app launch
do not trigger computer player when game is restored on app launch

- the purpose is that we want to be able to restore the board position last viewed
  by the user
- this partially reverses the change in 5ecb48b: a computer vs. computer game
  is now only paused when it is restored during app launch; if the game is loaded
  from the archive, the computer player is again triggered as it was before the
  change in 5ecb48b

herzbube/littlego,puremourning/littlego,puremourning/littlego,herzbube/littlego,herzbube/littlego,herzbube/littlego,puremourning/littlego,herzbube/littlego,puremourning/littlego