Bug 8730 - browse overlaying powered by

This patch adds a "z-index" property to the CSS for
the browse results menu so that it will appear
on top of the "Powered by Koha" link.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>

koha-tmpl/opac-tmpl/prog/en/css/opac.css

@@ -2195,6 +2195,7 @@ a.koha_url {
     display: none;
 	background-color:#F3F3F3;
 	padding-bottom:10px;
+    z-index: 100;
 }