Add file moderation tool

accounting/templates/accounting/operation_edit.jinja

@@ -16,6 +16,7 @@
 <h2>{% trans %}Edit operation{% endtrans %}</h2>
 <form action="" method="post">
     {% csrf_token %}
+    {{ form.non_field_errors() }}
     {{ form.journal }}
     {{ form.target_id }}
     <p>{{ form.amount.errors }}<label for="{{ form.amount.name }}">{{ form.amount.label }}</label> {{ form.amount }}</p>