GLWindow.setAlwaysOnTop() does not work on OSX

Hi there,

I wrote a small test program where I use the FPSAnimator and call setAlwaysOnTop() in the init() method:

https://github.com/codeanticode/jogl2-tests/blob/master/src/test/windows/WindowTopNEWT.java

It works as expected on Windows (10) and Linux (Ubuntu 12.04 with default window manager), but it does not on Mac OSX (10.9.5). I can file a bug report if needed.

Andres