NEWT: Insets (window decoration) and other fixes

NEWT: Insets (window decoration) and other fixes

In short, on X11 and Windows, NEWT handles the size of the window decoration properly now.
This allows one to layout the windows, as shown in:
  - TestSharedContextVBOES2NEWT utilizies proper window layout using Insets

Besides Insets, decoration/fullscreen toggle and reparenting has been simplified
and shall work better now.


Changeset:
  http://jogamp.org/git/?p=jogl.git;a=commit;h=b75630d3d28b5d2f92a0eeadae5b910a078e2c5d
  http://jogamp.org/git/?p=jogl.git;a=commit;h=7df4a53090c0dce45c5148166d7816064db997ba
  http://jogamp.org/git/?p=jogl.git;a=commit;h=70b495519094de5fcca37da68fbbf8762eecbe28
  http://jogamp.org/git/?p=jogl.git;a=commit;h=d4670328991c02a6f11f8873ea7a2331f17d0ef0
  http://jogamp.org/git/?p=jogl.git;a=commit;h=7ea8aa31e055ba95a062c87ec4d606f73c2504fa
  http://jogamp.org/git/?p=jogl.git;a=commit;h=4faa65ee907a78649e118717574c96031dc9e79b

~Sven