Fade Mode can halt interactivity on the iPad

The Fade Mode controls the opacity of individual slides, but does not hide them.

So slides that are later in the code, and therefore higher in the z-stacking, sit on top of and block interactivity of the active slide.

Hiding non-active slides with display:none or visibility:hidden should resolve this issue.

This can be replicated with the iOS Simulator.

Thanks!
