BF: Fix exception haveAvbin unitialized Win64 #637
FB 504, SetDeviceGammaRamp fails x64

On x64 SetDeviceGammaRamp fails about half the time due to an improper
sign extension bug in pyglet.  This fix should work 32/64 and will also
continue to work once pyglet fixes the bug.
Monitor selection box too narrow.

Switch from 200 wide to 500 wide.
Revert "Monitor selection box too narrow."

This reverts commit d8db1712077b392b125ee5e1c256eaf03216a42f.
Merge pull request #639 from jaybo/SetDeviceGammaRamp

BF: 504 SetDeviceGammaRamp fails on Win x64
Merge pull request #638 from jaybo/master

BF: Fix exception haveAvbin unitialized Win64 #637