allow supervisors to view shared exams

templates/user_score_header.html

@@ -31,9 +31,16 @@
 {% endif %}
 <h2>Exam: {{ exam }}</h2>
 <h3>Candidate: {{ cid|default_if_none:request.user.username }}</h3>
-{% if exam.results_supervisor_visible %} 
-    Exam results are visible to supervisor.<br/>
-{% else %}
-    Share results with supervisor: {{cid_user_exam.share_with_supervisor}}<br/>
+
+{% if cid_user_exam %}
+    {% if exam.results_supervisor_visible %}
+        Exam results are visible to supervisor.<br/>
+    {% else %}
+        Share results with supervisor: {{cid_user_exam.share_with_supervisor}} <button
+            class="btn btn-sm"
+            hx-get="{% url 'generic:toggle_share_with_supervisor' cid_user_exam.pk %}"
+        >Toggle</button>
+        <br/>
+    {% endif %}
 {% endif %}
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