polish detail pages (#1817)

templates/customer/edit.html.twig

@@ -1,5 +1,4 @@
 {% extends app.request.xmlHttpRequest ? 'form.html.twig' : 'base.html.twig' %}
-{% import "macros/widgets.html.twig" as widgets %}
 {% import "customer/actions.html.twig" as actions %}
 
 {% block page_title %}{{ 'admin_customer.title'|trans }}{% endblock %}