Deprecate public API where appropriate and make it no-ops.
Remove all calls to it.
Get rid of the 'transition' css property.
For now, this means spinners don't animate anymore.
* Restores the old padding
* Prelight on spin buttons
* Don't have a generic prelight background selector, as that got
picked up by things like images that should have a transparent bg.
Fixes reftests that were broken after images and labels applied padding.
Things look much more cramped now. On the plus side, treeview headers
and comboboxes have better spacing. Menubars look like crap now though.
Needs someone with artistical talent to figure out.
Just set oit for things that need it.
(FIXME: Buttons should probably not need it, but spinbuttons and
treeview headers don't have a proper background without it.)
