bugfix: disable resign button if all moves are undone
bugfix: disable resign button if all moves are undone
puremourning/littlego,puremourning/littlego,gcao/littlego_old,herzbube/littlego,puremourning/littlego,herzbube/littlego,herzbube/littlego,gcao/littlego_old,herzbube/littlego,herzbube/littlego,puremourning/littlego