Fix syntax error in user group form and enhance logging in bulk add groups view

generic/forms.py

@@ -673,12 +673,12 @@ class UserUserGroupForm(ModelForm):
 
                         // Wire up the "Add all results" button if present
                         const addAllBtn = results.parentElement.querySelector('.user-add-all-btn');
-                        if (addAllBtn) {
+                        if (addAllBtn) {{
                             addAllBtn.addEventListener('click', function(e) {{
                                 e.preventDefault();
                                 addAllFromResults(widgetFieldName);
                             }});
-                        }
+                        }}
 
                         window.addUserToField = function(fieldName, id, text, grade) {{
                             const sel = document.getElementById('id_' + fieldName);

generic/views.py

@@ -390,6 +390,7 @@ def exam_collection_bulk_add_groups(request, collection_id):
     collection = get_object_or_404(ExamCollection, pk=collection_id)
 
     logger.debug(f"exam_collection_bulk_add_groups called with method={request.method} by user={request.user.username}")
+    logger.debug(request)
 
 
     if request.method == "GET":