[UP-4274] OSX focus stealing

https://issues.jasig.org/browse/UP-4274
If we figure out how to retire [m]Universality for uPortal 4.2 (or 5!), then that'll be an opportunity to drop SASS?  Not that I want to terribly complicate this changeset with that, but I guess I'm saying that I'm less stressed about depending on that alpha in master for now if I can really believe that we can get rid of it again before we actually cut a release.