Set grid configuration to match comps
Use `position` instead of `opacity` to fix z-index.

See https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context
for a discussion of z-index stacking contexts.  Both `opacity` and
`position` can be used to create a new context.  Neither are ideal, but
I think of the available options `position: relative` is likely to have
the least side effects.
Animate show/hide for button pointers
Adjusts all transitions to use global settings