Only run setup_debug once the page has finished loading

lms/templates/staff_problem_info.html

@@ -92,6 +92,7 @@ category = ${category | h}
 
 <script type="text/javascript">
 // assumes courseware.html's loaded this method.
+$(function () {
     setup_debug('${element_id}',
         %if edit_link:
         '${edit_link}',