made undo btn in changelog work

templates/log.html

@@ -23,7 +23,7 @@
 						<td>{{i.path}}</td>
 						<td>"{{i.value_old}}"</td>
 						<td>"{{i.value_new}}"</td>
-						<td><a class="btn btn-default">undo</button></td>
+						<td><button onclick="moderatorinterface.set('{{i.path}}','{{i.value_old}}');alert('done');" class="btn btn-default">undo</button></td>
 					</tr>
 				{% endfor %}
 			</table>