Flash messages are not show in in .../check_email.html.twig

[alister]

In the default ResetPasswordController::reset() action, there is a (commented-out) suggestion for how to 'tell the user why a reset email was not sent'.

I uncommented it (wrapped in a $this->isGranted('ROLE_SUPPORT') {...), but no flash messages are shown - because the check_email.html.twig template does not check & display the flashes.

If you think adding the flashes to the template is a useful addition, I'd be happy to make a PR. It may also be useful to create a local .../reset_password/layout.html.twig base-file to remove the further duplication of the flashes-block that already has 2 copies.