diff -r 928732ec00dd -r fa44db7da2dc web/data/cubicweb.css
--- a/web/data/cubicweb.css	Thu Jul 17 11:08:56 2014 +0200
+++ b/web/data/cubicweb.css	Fri Jul 18 17:35:25 2014 +0200
@@ -200,9 +200,15 @@
   visibility: hidden;
 }
 
-li.invisible {
-  background: none;
-  padding: 0px 0px 1px 1px;
+/* copied verbatim from bootstrap 3.0 */
+.invisible {
+  visibility: hidden;
+}
+
+/* copied verbatim from bootstrap 3.0 */
+.list-unstyled {
+  padding-left: 0;
+  list-style: none;
 }
 
 .caption {