Fix grading/starter code panel IDs

course/templates/course/prompt-code-question.html

@@ -4,13 +4,13 @@
   <div class="panel panel-default" markdown="block">
     <div class="panel-heading">
       <h4 class="panel-title">
-      <a data-toggle="collapse" href="#starter-code">
+      <a data-toggle="collapse" href="#grading-code">
         Grading code
         <span style="font-size:x-small">(click to view)</span>
       </a>
       </h4>
     </div>
-    <div id="starter-code" class="panel-collapse collapse">
+    <div id="grading-code" class="panel-collapse collapse">
      <div class="panel-body">
       {% if show_setup_code and setup_code %}
         Set-up: