[rentals] Clear locker forms when dropdown menus are closed

rentals/templates/rentals/lockers.dj.html

@@ -117,3 +117,12 @@
     </div>
   {% endfor %}
 {% endblock %}
+{% block footer %}
+  <script type="text/javascript" src="{% static 'admin/js/vendor/jquery/jquery.js' %}"></script>
+  <script>
+    // reset form when dropdown menu is closed
+    document.addEventListener('hide.bs.dropdown', (e) => {
+      e.target.parentElement.querySelector('.dropdown-menu form').reset();
+    });
+  </script>
+{% endblock %}