add sorting to failures page

atdb/taskdatabase/templates/taskdatabase/failures/tasks_failures_headers.html

 <tr>
-    <th>ID</th>
+    <th>
+        <a href="{% url 'sort-tasks' '-pk' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-up"></i></a>
+        ID
+        <a href="{% url 'sort-tasks' 'id' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-down"></i></a>
+    </th>
     <th>Details</th>
-
-    <th>Status</th>
-    <th>Project</th>
-    <th>SAS_ID</th>
-    <th>filter</th>
+     <th>
+        <a href="{% url 'sort-tasks' '-status' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-up"></i></a>
+        Status
+        <a href="{% url 'sort-tasks' 'status' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-down"></i></a>
+    </th>
+    <th>
+        <a href="{% url 'sort-tasks' '-project' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-up"></i></a>
+        Project
+        <a href="{% url 'sort-tasks' 'project' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-down"></i></a>
+    </th>
+    <th>
+        <a href="{% url 'sort-tasks' '-sas_id' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-up"></i></a>
+        SAS_ID
+        <a href="{% url 'sort-tasks' 'sas_id' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-down"></i></a>
+    </th>
+    <th>
+        <a href="{% url 'sort-tasks' '-filter' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-up"></i></a>
+        Filter
+        <a href="{% url 'sort-tasks' 'filter' 'failures' %}" class="btn btn-light btn-sm" role="button"><i class="fas fa-sort-down"></i></a>
+    </th>
     <th>Actions</th>
 </tr>
\ No newline at end of file