edx/edx-platform — pull request #1779 by talbs (2013-11-26 01:59:12+00:00)
Title: Studio: FIX - correcting hiding state of notification UI for < IE9

This work adds a state to cater to styling notifications that have the class "is-hiding" in < IE9. IE9 doesn't support CSS transitions/animations, thus this state of hiding also needs to be accommodated for.