1.	Only draw slots that are being used
2.	Center grid in viewport
3.	Button tool tips
4.	Main menu
5.	Pause menu
6.	Robot model & texture
7.	Separate button images from dialog box
8.	Implement confirm exit dialog
9.	Create textures for each button state
10. Help interface
11. Add button to clear code panes
12. Get interface working again
13. Finish conversion to world model