alfortville: add a message when there are no mails in tables

welco/contrib/alfortville/templates/alfortville/mail-table.html

@@ -5,6 +5,7 @@
 
 {% block content %}
 
+{% if objects %}
 <div class="source-mail all">
 <div class="cell document top">
 <h2>{{title}}</h2>
@@ -59,5 +60,21 @@ $(function() {
   });
 });
 </script>
+{% else %}
+<!-- nothing -->
+
+<div class="source-mail all">
+<div class="cell document top">
+<h2>{{title}}</h2>
+
+<p class="no-mail-table">
+{% trans 'There is currently no mail in this list.' %}
+</p>
+
+</div>
+</div>
+
+
+{% endif %}
 
 {% endblock %}

welco/static/css/style.css

@@ -442,3 +442,7 @@ form#note textarea {
 	top: 2px;
 	margin-right: 1ex;
 }
+
+p.no-mail-table {
+	padding: 10px;
+}