MenuLayout: Avoid `transition: all`, be precise

Authored by matmarex on Jun 4 2018, 10:05 PM.


MenuLayout: Avoid transition: all, be precise

Using all ends up animating really *all* animatable properties,
including ones that we don't define here, and including silly ones
like font-size.

It's especially annoying when toggling CSS rules in the inspector
or slow loading causes stuff to animate (T195986).

Change-Id: Ic109cfc4b0677bb472fb2e0e7d3bc86da6a5fb62