Graph RegionRenderer: Fix GL3 and ES3 GLSL issues

Macro redefine 'texture2D -> texture'
was added _after_ the custom texture lookup insertion
causing GL3-core to fail.
GraphUI Demo: Analyze issue w/ OSX and NewtCanvasAWT when rendering / animating GLEventListenerButton

Analyze issue w/ OSX and NewtCanvasAWT when rendering / animating GLEventListenerButton.

FBO of main 'window' is _not_ updated ..

Probably related to CALayer - FBO - FBO* (of this button) ..