BoardTileView now updates layers if it is reused
BoardTileView now updates layers if it is reused

a BoardTileView instance in the reuse queue no longer receives any
notifications, so it might miss events that require a layer to be added
or removed. BoardTileView therefore now updates its layers when it is
re-activated from the reuse queue.

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