New preset game modes

1. Practice Mode
	Unlimited Everything
2. Normal Mode
	10 Undos
3. Pro Mode
	No Undos
4. Quick Game Mode
	60 Seconds and 60 Moves
5. Survival Mode
	30 seconds. Combine tiles for more time
6. XMode
	Movable X tile that can't be combined
7. Corner Mode
	Immovable Blocks In Corners
8. Crazy Mode
	5x5 grid, Corner, X, and Survival modes
Code cleanup