Allow stages edition in attribution view

Unfortunately, the popup is not closed when the object is saved.
It appears this scenario is not planned in Django.

stages/static/js/attribution.js

@@ -99,6 +99,10 @@ function update_trainings(period_id) {
             referent.text(parsed[1] +' (' + (parseInt(parsed[2]) - 1) + ')');
         });
       });
+      $('a.edit_training').click(function(ev) {
+        ev.preventDefault();
+        showAddAnotherPopup(this);
+      });
       set_export_visibility();
   });
 }

templates/attribution.html

@@ -35,6 +35,7 @@
 
 {% block extrahead %}
   <script type="text/javascript" src="{% static "admin/js/jquery.js" %}"></script>
+  <script type="text/javascript" src="{% static "admin/js/admin/RelatedObjectLookups.js" %}"></script>
   <script type="text/javascript" src="{% static "js/attribution.js" %}"></script>
   <script type="text/javascript">var static_url = '{{ STATIC_URL }}';</script>
 {% endblock %}

templates/trainings_list.html

@@ -1,6 +1,8 @@
+{% load url from future %}
 {% for obj in trainings %}
 <li id="training_{{ obj.id }}">{{ obj.student }} ({{ obj.student.klass }}) - {{ obj.availability.corporation }} - {{ obj.availability.domain }}
     {% if obj.referent %} (réf: {{ obj.referent }}){% else %}- <span class="missing">Pas de référent</span>{% endif %}
+    &nbsp;&nbsp;<a class="edit_training" href="{% url 'admin:stages_training_change' obj.id %}"><img src="{{ STATIC_URL}}admin/img/icon_changelink.gif"></a>
     <img class="delete_training" src="{{ STATIC_URL}}admin/img/icon_deletelink.gif">
 </li>
 {% endfor %}