Fix form in navbar

docs/examples/jumbotron.html

@@ -63,7 +63,7 @@ title: Jumbotron template
           </ul>
         </li>
       </ul>
-      <form class="navbar-form pull-right">
+      <form class="navbar-form form-inline pull-right">
         <input type="text" placeholder="Email">
         <input type="password" placeholder="Password">
         <button type="submit" class="btn">Sign in</button>