SSO/SAML and Direct Login enabled: show registration button already on first page

[mathiasconradt]

When SSO/SAML as well as Direct Login is enabled in Nextcloud, there is a page before the regular login page.

If you have the Registration app enabled, the registration button would, in this scenario, only appear after the user has clicked the "Direct Login" button, it would make sense though to already show the registration button on this very first page.

[pellaeon]

This is likely a limitation by \OC_App::registerLogIn() which this app relies on to show login options. The function is located in the core, I will investigate more later.