Added fancy error message if ski-lift gets disabled.

dav_events/templates/dav_events/base.html

@@ -44,6 +44,8 @@
     </div>
 
     <div id="page-body">
+        {% block modals %}
+        {% endblock modals %}
 	    {% block page-body %}
         <div class="container-fluid">
             {% block page-container-fluid %}