Show hover status in nav bar hamburger menu on mobile

src/UI/Content/navbar.less

@@ -150,6 +150,16 @@
       }
     }
   }
+
+  .navbar-collapse {
+    .navbar-nav {
+      li {
+        &:focus, &:hover {
+          background-color: #535353;
+        }
+      }
+    }
+  }
 }
 
 .search {