allow resenting of exam answers

generic/templates/generic/exam_overview_headers.html

@@ -36,6 +36,23 @@ Exam mode: {{ exam.exam_mode }}<br />
 {% if exam.exam_mode %}
     Cid candidates: <a href="{{exam.get_cid_edit_url}}">{{candidate_count.0}}</a>, User candidates: <a href="{{exam.get_user_edit_url}}">{{candidate_count.1}}</a><br />
 {% endif %}
+
+<details>
+    <summary>Answer management</summary>
+
+    <div class="alert alert-danger">
+    <p>Manage answers for this collection. </p>
+
+    Please note these are permanant and cannot be undone.
+    </div>
+
+    <button title="This will clear all user answers and attempts"
+    hx-post="{% url exam.get_app_name|add:':exam_reset_answers' exam.pk %}"
+    hx-swap="outerHTML"
+    >Reset all answers</button>
+    
+</details>
+
 Open access: {{ exam.open_access }}<br />
 
 {% if exam.start_date %}
@@ -66,3 +83,5 @@ Open access: {{ exam.open_access }}<br />
 Author(s): {% for author in exam.author.all %}
     {{ author }}{% if not forloop.last %}, {% endif %}
 {% endfor %}<br/>
+
+