SAML - New UI Login SSO Button does not respect the nexus-context-path

Reproduce steps

1. in nexus.properties, set nexus-context-path=/nexus
2. start nxrm
3. configure saml
4. log in with SSO
5. the button redirects to http://localhost:8081/saml which gives a Jetty 404

Expected Result:

1. the button should redirect to http://localhost:8081/nexus/saml

Workaround:

1. going to http://localhost:8081/nexus/saml does successfully kick off the redirect process to IDP (Keycloak in my case) and I can successfully log in

Login at http://localhost:8081/nexus

Redirected to http://localhost:8081/saml