MacGui: moved the main window toolbar to the xib.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6578 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: set the fTitle to NULL before performing a scan.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6579 b64f7644-9d1e-0410-96f1-a4d463321fa5