exports: display group as a breadcrumb in template

add a private method in controller which could be moved maybe in ExportManager

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

@@ -36,6 +36,11 @@ 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>
+        
         <h1>{{ export.title|trans }}</h1>
         <h2>{{ "Download export"|trans }}</h2>
         

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

@@ -27,6 +27,11 @@
 {% block content  %}
     <div class="col-md-10">
     
+        <h6>
+            <i class="fa fa-folder-open-o fa-fw"></i>
+            {{ export_group|trans }}
+        </h6>
+    
         <h1>{{ export.title|trans }}</h1>
         
         <p>{{ export.description|trans }}</p>

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

@@ -23,6 +23,11 @@
 {% block content %}
     <div class="col-md-10">
         
+        <h6>
+            <i class="fa fa-folder-open-o fa-fw"></i>
+            {{ export_group|trans }}
+        </h6>
+        
         <h1>{{ export.title|trans }}</h1>
         
         <p>{{ export.description|trans }}</p>

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

@@ -22,6 +22,11 @@
 
 {% block content %}
     <div class="col-md-10">
+    
+        <h6>
+            <i class="fa fa-folder-open-o fa-fw"></i>
+            {{ export_group|trans }}
+        </h6>
         
         <h1>{{ export.title|trans }}</h1>