[UP-4274] OSX focus stealing

https://issues.jasig.org/browse/UP-4274
If we don't want to commit to retiring universality, I actually think it would be a decent idea to convert the SASS to LESS.   The syntax for both is very similar and it shouldn't be terribly difficult to port but then we only have 1 CSS preprocessor to deal with.  That too would eliminate the need for this plugin.