Form submission handler.
array $form: An associative array containing the structure of the form.
array $form_state: An associative array containing the current state of the form.
Overrides FormInterface::submitForm
public function submitForm(array &$form, array &$form_state) {
$new_menu_link = $this->menuLink
->reset();
drupal_set_message(t('The menu link was reset to its default settings.'));
$form_state['redirect'] = 'admin/structure/menu/manage/' . $new_menu_link->menu_name;
}