[#5913] restore ui-icon-* classes in top menu
[#5913] restore ui-icon-* classes in top menu

apache/incubator-allura,lym/allura-git,heiths/allura,lym/allura-git,apache/allura,heiths/allura,apache/allura,lym/allura-git,heiths/allura,apache/allura,apache/incubator-allura,lym/allura-git,heiths/allura,heiths/allura,apache/allura,apache/allura,apache/incubator-allura,apache/incubator-allura,lym/allura-git