Interactive content does not work in slides

[alexerlandsson]

Since the slides are using opacity for showing/hiding the last slide will always be placed on top of the others. Before, I used z-index to solve this but that resulted in a buggy transition between slides since the z-index had to change the order.

I've commited a quick fix where I'm using pointer-events to prevent actions from other slides to be triggered but this solution does not work in IE9 and IE10.

I need to find another way of how to take care fo this issue.