Bug 13590: Add missing th in tfoot

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

koha-tmpl/intranet-tmpl/prog/en/modules/admin/smart-rules.tt

@@ -326,6 +326,7 @@ for="tobranch"><strong>Clone these rules to:</strong></label> <input type="hidde
                       <th>Hard due date</th>
                       <th>Fine amount</th>
                       <th>Fine charging interval</th>
+                      <th>Charge when?</th>
                       <th>Fine grace period</th>
                       <th>Overdue fines cap (amount)</th>
                       <th>Suspension in days (day)</th>