Added disabled button for downloading event list.

dav_events/templates/dav_events/event_list.html

@@ -10,6 +10,9 @@
         <li>
             <a class="btn-primary" href="{% url 'dav_events:event_create' %}">{% trans 'Neue Veranstaltung' %}</a>
         </li>
+        <li class="disabled">
+            <a class="" href="{% url 'dav_events:event_list' %}">{% trans 'Veranstaltungsliste downloaden' %}</a>
+        </li>
     </ul>
 </div>