Resolve "Add support for group notes"

Closes #68 (closed)

aleksis/apps/alsijil/templates/alsijil/class_register/lesson.html

@@ -88,7 +88,7 @@
 
                     {% if prev_doc.group_note %}
                       <tr>
-                        <th class="collection-item">{% trans "Group notes for this lesson:" %}</th>
+                        <th class="collection-item">{% trans "Group notes for previous lesson:" %}</th>
                         <td>{{ prev_doc.group_note }}</td>
                       </tr>
                     {% endif %}