Add export button to social actions template

src/Bundle/ChillPersonBundle/Resources/views/SocialWork/SocialAction/index.html.twig

@@ -35,6 +35,9 @@
         {% endblock %}
 
         {% block actions_before %}
+            <li>
+                <a href="{{ path('chill_person_social_action_export_list') }}" class="btn btn-download"></a>
+            </li>
             <li class='cancel'>
                 <a href="{{ path('chill_main_admin_central') }}" class="btn btn-cancel">{{'Back to the admin'|trans}}</a>
             </li>