#112 WIP: Restructure CompensationAction

* changes action_type from ForeignKey into M2M
* adds migration
* changes form widget
* WIP: changes rendering on detail view of compensation
* TEST NOT CHECKED YET!

ema/templates/ema/detail/includes/actions.html

@@ -44,7 +44,11 @@
             {% for action in obj.actions.all %}
             <tr>
                 <td class="">
-                    <span>{{ action.action_type }}</span>
+                    <ul>
+                        {% for type in action.action_type.all%}
+                        <li> {{type}} </li>
+                        {% endfor %}
+                    </ul>
                     {% if action.action_type_details.count > 0 %}
                         <br>
                         {% for detail in action.action_type_details.all %}