désactive le formulaire sur les demandes déjà validées (#24339)

src/authentic2_cut/templates/authentic2/cut_manager_user_validation.html

@@ -72,6 +72,18 @@ $('body').on('click', 'img.popup-image', function (event) {
 </div>
 {% endblock %}
 
+{% block beforeform %}
+  {% if validation_request.validated %}
+    <fieldset disabled style="border: none">
+  {% endif %}
+{% endblock %}
+
+{% block afterform %}
+  {% if validation_request.validated %}
+    </fieldset>
+  {% endif %}
+{% endblock %}
+
 {% block buttons %}
     {% if not validation_request.validated %}
       <div class="buttons">