exports: put breadcrumb in an include, add a link to go back to the list

src/Bundle/ChillMainBundle/Resources/views/Export/download.html.twig

@@ -36,10 +36,7 @@ window.addEventListener("DOMContentLoaded", function(e) {
 {% block content %}
     <div class="col-md-10">
     
-        <h6>
-            <i class="fa fa-folder-open-o fa-fw"></i>
-            {{ export_group|trans }}
-        </h6>
+        {{ include('@ChillMain/Export/_breadcrumb.html.twig') }}
         
         <h1>{{ export.title|trans }}</h1>
         <h2>{{ "Download export"|trans }}</h2>