TPAC: Redo some margins/padding for better collapse behavior

TPAC: Redo some margins/padding for better collapse behavior

In the "results header", we have both buttons and form elements. In
order to have these elements collapse in an orderly fashion, they need
to be exactly the same size. To accomplish this, let's simplify and
redo a few of the element margins and padding.

At the very least, this will make the elements line up better
vertically when viewed at the normal screen width.

Signed-off-by: Dan Wells <dbw2@calvin.edu>