MacGui: Fixed the languages selection in the built in presets for languages with a native name.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6300 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: select the default preset in the presets drawer at start up. Added a missing NSAlert release.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6301 b64f7644-9d1e-0410-96f1-a4d463321fa5