[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

jhu-lcsr-forks/ogre,vancepym/ogre,vancepym/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,vancepym/ogre