wcs: add a "is-redirection" class to forms that are redirections (#6561)

combo/apps/wcs/templates/combo/wcs/forms_of_category.html

@@ -3,7 +3,9 @@
 {{ description|safe }}
 <ul>
 {% for form in forms %}
-<li {% if form.authentication_required %}class="required-authentication"{% endif %}><a href="{{ form.url }}tryauth">{{ form.title }}</a></li>
+<li class="{% if form.authentication_required %}required-authentication"{% endif %}
+           {% if form.redirection %}is-redirection{% endif %}"
+  ><a href="{{ form.url }}tryauth">{{ form.title }}</a></li>
 {% endfor %}
 </ul>
 </div>