[keycloak-dev] Allow passing current locale to OAuth2 IdPs

We would like to have the user's current locale passed along to an OAuth2 identity provider as a ui_locales parameter. This would allow the user to select a custom locale on our Keycloak instance and continue to have same locale on the external IdP. Any thoughts on such a feature? I have created an example implementation, see https://github.com/keycloak/keycloak/compare/master...knutz3n:feature/pas..., and I will add tests and create a PR if you would like to merge it. Regards, Johannes Knutsen