[GL3+] Use the content rect for sizing the OS X view to fix clipping under the title bar.
[GL3+] Use the content rect for sizing the OS X view to fix clipping under the title bar.

--HG--
branch : v1-9

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre