Add back the full screen mode as a menu option, temporarily.
Use lowercase h to toggle full screen mirror, capital H for inset.
Merge branch 'master' of https://github.com/worklist/hifi
Merge pull request #1103 from ey6es/master

As a temporary measure, restore the full screen mirror as a menu option.
Merge branch 'master' of https://github.com/worklist/hifi into fix_mirror_mode
fix merge issue