Fixed #4447 Error in files /usr/local/ispconfig/interface/web/client/lib/lang/{ru,en and etc}.lng

Author: Till Brehm

interface/web/client/lib/lang/en.lng

@@ -26,4 +26,5 @@ $wb['error_domain_in webuse'] = 'This domain cannot be deleted, because it is in
 $wb['error_client_can_not_add_domain'] = 'You cannot add a new domain';
 $wb['domain_txt'] = 'Domain';
 $wb['error_client_group_id_empty'] = 'You have to select a customer<br>';
+$wb['Email-Templates'] = 'Email-Templates';
 ?>