// Avoid notice with undefined variable confirm

admin-dev/themes/default/template/helper/list/list_action_delete.tpl

@@ -23,6 +23,6 @@
 *  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 *  International Registered Trademark & Property of PrestaShop SA
 *}
-<a href="{$href}" onclick="return confirm('{$confirm}');" title="{$action}">
+<a href="{$href}" {if isset($confirm)}onclick="return confirm('{$confirm}');"{/if} title="{$action}">
 	<img src="../img/admin/delete.gif" alt="{$action}" />
 </a>