Add "Download" button to Audit Trail list when items are within exportable limit

- Display a download button if the total number of audit trail items is within `MAX_LINES`.
- Added the download action as a form submission with the appropriate route.

src/Bundle/ChillMainBundle/Resources/views/AuditTrail/list.html.twig

@@ -24,4 +24,14 @@
     </div>
 
     {{ chill_pagination(pagination) }}
+
+    {% if pagination.totalItems <= constant('Chill\\MainBundle\\Audit\\AuditEventDumper::MAX_LINES') %}
+        <ul class="record_actions sticky-form-buttons">
+            <li>
+                <form method="post" action="{{ path('chill_main_audit_trail_generate', app.request.query.all) }}">
+                    <button class="btn btn-action"><i class="bi bi-download"></i> {{ 'audit_trail.list.download'|trans }}</button>
+                </form>
+            </li>
+        </ul>
+    {% endif %}
 {% endblock %}