Bug 15223 - fix buttons on patron lists

Bug 15223 - fix buttons on patron lists

To test:
go to tools -> patron lists
notice that the buttons are not misaligned anymore

You may need to force refresh the page to see the original issue, and to see it fixed.

With patch buttons display nicely.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit dba72d903deb525250bfb8b633b88e2aa7b1b962)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>