WIP: Ripple with css

To avoid problems with javascript animations (lag), use css for the ripple.
All of the current mixins apply the same values to different prefixed properties.

In this case, we apply a different value to `-webkit-transition-property` than to `transition-property`, so the mixin wouldn't work. 

This kind of functionality could be added to a mixin, but it would be a very specific implementation that can also be solved just with one line of css.