Screen/Linux: New-Style-Override redirect on KDE + IntelGPU automatically.

KDE needs this on Intel GPU's, but strangely not on other GPU's,
so detect if we're running on KDE + Intel and automatically enable
the new-style override redirect workaround.

-> Screen for 64-Bit Octave on Linux rebuilt and tested.
-> Now works on all tested DE's (KDE, Unity, GNOME-3, GNOME-2, GNOME-classic)
   properly with the Intel HD Ironlake Mobile gpu.