add 'saveKeys' boolean to GameType.game_type, which should tell us to assign the new userKeys record to the InputState (which is implemented), and should also tell us to convert the keys to a string and save it to controls.config

fcore/level/level-update.sml

@@ -42,6 +42,6 @@ struct
         , fallingEnemies = fallingEnemies
         }
     in
-      {mode = GameType.LEVEL mode, userKeys = userKeys}
+      {mode = GameType.LEVEL mode, userKeys = userKeys, saveKeys = false}
     end
 end