adding a date for the address

The address are computed to be valid at a given date.

The date input appears only if fields concerning address are checked.

Resources/views/Export/ListPersonFormFields.html.twig

@@ -0,0 +1,5 @@
+{% block _export_export_list_export_form_address_date_row %}
+    <div data-display-show-hide="address_date">
+        {{ form_row(form) }}
+    </div>
+{% endblock %}