Update code to handle Display.getHeight instead of a static screen height.
Improve code to allow for vertical sliders.
Update code to handle the new GLSlider constructor.
Rename GameMenu to GameMenuInterface.
Move code from ChestInterface.java to Interface.java for drawing boxes on the screen. Add a boolean to test if the boxes should be drawn or not.
Remove code to draw boxes on the screen.
Update reference to GameMenuInterface.
Update code to draw boxes on the interface. Swap foreground and background colours.