Bug 13205: [FOLLOW-UP] Some extra logic

Bug 13205: [FOLLOW-UP] Some extra logic

See Comment 8.

Test:
When on first page of results, confirm that the 'First' and 'Previous'
buttons do not show. Confirm they come back on the second page and every
page after.
When on last page of results, confirm that the 'Last' and 'Next' buttons
do not show. Confirm they come back on all previous pages.
Check on both staff side and OPAC.

Sponsored-by: Catalyst IT
Signed-off-by: Lee Jamison <ldjamison@marywood.edu>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>