Escape now moves up a menu level in all menus. Started GameLobbyState,
but starting a game crashes everything (no Players are added yet).
Discovered a bug where if you hit "New Game" then go back a level and
try to load a game, it will instead send you to the network menu. Added
an icon for the game. You can now resize the game window, but it
exhibits some strange behaviors that I'm not sure if we'll be able to
change. Fixed a bug in MapManager.loadMaps().