Added allowempty setting to ISEMAIL validator.

Till Brehm

2016-01-29 a8ab61eeb0beac52d5a1e8c41d549df4ed87bf71

 interface/web/admin/groups_edit.php

@@ -43,6 +43,7 @@

//* Check permissions for module
$app->auth->check_module_permissions('admin');
$app->auth->check_security_permissions('admin_allow_cpuser_group');

// Loading classes
$app->uses('tpl,tform,tform_actions');