Fixed error with enforcing permission on accept.

dav_events/templates/dav_events/event_detail.html

@@ -38,8 +38,7 @@
         </li>
         <li class="{% if not has_permission_accept %}disabled{% endif %}">
             <a class="btn {% if has_permission_accept %}btn-success{% else %}disabled{% endif %}"
-               data-toggle="modal" data-target="#modal-accept-dialog"
-               ihref="{% url 'dav_events:event_accept' event.pk %}">{% trans 'Freigeben' %}</a>
+               data-toggle="modal" data-target="#modal-accept-dialog">{% trans 'Freigeben' %}</a>
         </li>
         <li class="{% if not has_permission_update %}disabled{% endif %}">
             <a class="btn {% if has_permission_update %}btn-warning{% else %}disabled{% endif %}"