Removed some old deprecated code.
Allowed the use of the % sign in the following UI fields:

rect
shadowX
shadowY
textalignx
textaligny
text2alignx
text2aligny
elementWidth
elementHeight
elementSpacingW
elementSpacingH

For example, in rect:

rect 50% 50% 25% 25%

This is 50% down and to the right, and takes up approximately 25% of the screen width and height
Merge branch 'master' of https://github.com/JKGDevs/OpenJK