The previous transition was supposed to be a center-anchored elastic
scale-in, but this didn't work as intended - because the multiplier
ended up inside of an auto-sized right-aligned container, the animation
itself would end up being anchored right.
Attempts to remove the scale transition resulted in a rather
jarring-looking result, so swap out the elastic scale-in for a sweep-in
effect from the top, to match the header and avoid introducing too many
directions of movement.
Delay values tweaked "to taste" - can be adjusted further if there is an
alternative set of values that feels better.
170df01b46