Dialog userInscription = new Dialog(inscriptionDialogId, new Model("Inscription"), settings){
@Override
public Panel createContent(String arg0) {
return new UserInscription(arg0, new CompoundPropertyModel(new User())){
@Override
public void onSave(AjaxRequestTarget target, Form form) {
User user = (User)form.getModelObject();
user.setRoles(new ArrayList<Role>());