v0.5.4 bug fixes: stuck tiles and bots that stopped playing

okey.gg

Hi everyone, This small update fixes a few bugs, most of them in the middle of a game. Tiles stuck while opening In 101, a tile you had just drawn could get stuck above your rack while you were opening your hand, and you couldn't take it back. Now a tile the game doesn't accept always goes back onto your rack, and taking back an opening works every time, even with a tile you just drew. Bots that stopped playing So