application: make language switch a simple dropdown menu

app/views/layouts/application.html.erb

@@ -87,26 +87,14 @@
              <%= yield(:license) %>
              <li>|</li>
              <%= yield(:impressum) %>
-             <li><a id="footer_nav" class="footer_lang" data-target="#lang" data-toggle="modal"><i class="glyphicon glyphicon-globe"></i> toggle language</a></li>
-         </ul>
-         <div class="modal fade" id="lang" tabindex="-1" role="dialog">
-             <div class="modal-dialog">
-                 <div class="modal-content">
-                     <div class="modal-body container-fluid">
-                         <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
-                         <div style="text-align:center;">
-                             <h2>available languages</h2>
-                             <div class="col-md-6">
-                                 <%= link_to "German", change_locale_path(:de), :class => "btn btn-default" %>
-                             </div>
-                             <div class="col-md-6">
-                                 <%= link_to "English", change_locale_path(:en), :class => "btn btn-default" %>
-                             </div>
-                         </div>
-                     </div>
-                 </div>
+             <div class="dropdown dropup pull-right">
+                 <a id="footer_nav" class="footer_lang dropdown-toggle" data-toggle="dropdown"><i class="glyphicon glyphicon-globe"></i> toggle language</a>
+                 <ul class="dropdown-menu" role="menu">
+                     <li><%= link_to "German", change_locale_path(:de), :class => "btn btn-default" %></li>
+                     <li><%= link_to "English", change_locale_path(:en), :class => "btn btn-default" %></li>
+                 </ul>
              </div>
-         </div>
+         </ul>
     </div>
 </footer>
  <script src="//assets.illuna-minetest.tk/js/jquery.min.js"></script>