Bigger user selection box in group creation/edit

pboard/pboard/public/css/style.css

 
 ul.nav-tabs li.active > a { background-color: #efefef; }
 div.tab-pane > h4 { background-color: #efefef; padding: 0.5em; margin: 0 0 0.5em 0;}
+
+/* Admin form select */
+
+#sx_users { height: 250px; }