[#2947] Add background and opacity to iframe fix div to prevent IE9 from  sending mouse events to iframes beneath it
[#2947] Add background and opacity to iframe fix div to prevent IE9 from  sending mouse events to iframes beneath it

BBGInnovate/butter,BBGInnovate/butter,mbuttu/butter,mbuttu/butter,robinparadise/videoquizmaker,mozilla/butter,robinparadise/videoquizmaker,mbuttu/butter,mozilla/butter