add missing menu items to united page

united/index.html

@@ -73,6 +73,9 @@
               <ul class="dropdown-menu" aria-labelledby="download">
                 <li><a tabindex="-1" href="./bootstrap.min.css">bootstrap.min.css</a></li>
                 <li><a tabindex="-1" href="./bootstrap.css">bootstrap.css</a></li>
+                <li class="divider"></li>
+                <li><a tabindex="-1" href="./variables.less">variables.less</a></li>
+                <li><a tabindex="-1" href="./bootswatch.less">bootswatch.less</a></li>
               </ul>
             </li>
           </ul>