[OS X] Misc cleanup for the config dialog. Add escape key as a shortcut for Cancel. Fix crash when hitting cancel as well.
[OS X] Misc cleanup for the config dialog. Add escape key as a shortcut for Cancel. Fix crash when hitting cancel as well.

--HG--
branch : v1-9

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