Ensure modal windows made by cinnamon get focus correctly when using a full
screen program.  For example, watching a video fullscreen, then alt-tabbing,
without this patch, most times, the alt-tab popup won't appear, even though it
will function.  With this patch, alt-tab properly shows above everything
Merge pull request #2284 from mtwebster/disable-unredirect-on-modal

Ensure modal windows made by cinnamon get focus correctly when using a full screen program