Comment 13 for bug 1982676

The proposed patch mitigates the issue by removing the redirect entirely, which of course works, but degrades the user experience. We can merge it as a stopgap solution, but a correct long-term fix would be to validate the url before redirecting, like we do here:

https://github.com/openstack/horizon/blob/master/horizon/workflows/views.py#L96-L102