Better FX params organization

[uDevah]

Now all params are added one after other with no idea from what FX belong X param.

The idea was add some enable/disable checkbox as separation too, but Fede says only textboxes allowed.

So my idea is something like this:

----- GRADIENT ---- [0] (0,1) To enable/disable the FX
Param1 [0]
Param2 [0]
----- OVERLAY ----- [0] (0,1) To enable/disable the FX
Param1 [0]
Param2 [0]
Etc...

Is to be used on a Sprite with Rotate3D, due with only one FX there is no preDraw issue like in 3D Shape.