Use the same 'margin-bottom' bot for the normal and mobile layout fixing
one of the panels touching the footer.
Use same font size both for <h1> and <h2> used as the column titles as
rst2html5 based on version can generate either of them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>