schedule/events: restore original sorting order

Author: hrw

layouts/main.html

@@ -195,8 +195,8 @@ <h3><%= column.keys.first.to_s %></h3>
 <script>
   new DataTable('#events', {
     order: [
-      [3, 'asc'],
       [4, 'asc']
+      [2, 'asc'],
     ],
     fixedHeader: true,
     mark:        true,