add Progress Bars to Components narbar dropdown

docs/javascript.html

@@ -73,6 +73,7 @@
                 <li><a href="./components.html#pagination">Pagination</a></li>
                 <li><a href="./components.html#thumbnails">Thumbnails</a></li>
                 <li><a href="./components.html#alerts">Alert messages</a></li>
+                <li><a href="./components.html#progress">Progress bars</a></li>
               </ul>
             </li>
             <li class="dropdown active">