admin-ui: Fix style bug

The table of IP history in details was getting out of the wrapper
in Firefox.
A horizontal scrollbar solves the problem.

snf-admin-app/synnefo_admin/admin/static/sass/_details.scss

@@ -180,8 +180,9 @@
         border-bottom: 2px solid $object-details-border;		
         background: $object-details-bg;
 		padding:14px 20px;
-		.object-details {
-			padding: 5px 20px;
+        overflow-x: auto;
+        .object-details {
+            padding: 5px 20px;
             &:hover,
             &:focus{
                 background: $object-details-row-hover-bg;