WinGui:  Options screen refactoring.
Help -> Check for updates now takes the user to the options screen update tab.
Help -> About now takes the user to the options screen about tab.  Saves popping up annoying window.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5169 b64f7644-9d1e-0410-96f1-a4d463321fa5