WinGui: Fix up libhb encode feature.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5790 b64f7644-9d1e-0410-96f1-a4d463321fa5
WinGui: Remove now unneeded debug menu

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5791 b64f7644-9d1e-0410-96f1-a4d463321fa5