Bug 31974: (follow-up) Correct some other specificity issues

Bug 31974: (follow-up) Correct some other specificity issues

This follow-up makes a couple other minor corrections to label
alignment. This allows for correct top-alignment of labels in forms but
lets labels in other contexts, especially checkbox or radio button
labels, to be aligned "middle."

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>