Bug 18421: (follow-up) Center image in results table

Adds the "thumbnail" class to the image to have it centered.

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

koha-tmpl/intranet-tmpl/js/coce.js

@@ -32,6 +32,7 @@ KOHA.coce = {
           $("[id^=coce-thumbnail]."+id).each(function() {
             var img = document.createElement("img");
             img.src = url;
+            img.classList.add("thumbnail");
             img.title = url; //FIXME: to delete
             $(this).html(img);
          });