StackView: Rewire vigorously, so that transitions happen more neatly.
StackView: Rewire vigorously, so that transitions happen more neatly.

It's not quite a single frame, especially when popping. But it's much neater
than it was before.

fixup

jlhughes/foam,jlhughes/foam,jacksonic/foam,osric-the-knight/foam,osric-the-knight/foam,jacksonic/foam,osric-the-knight/foam,osric-the-knight/foam,foam-framework/foam,jacksonic/foam,jacksonic/foam,mdittmer/foam,mdittmer/foam,mdittmer/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,mdittmer/foam