[MM3-users] Poor rendering of disabled registration page

Dears,

I have set ACCOUNT_ADAPTER = 'django_mailman3.views.user_adapter.DisableSignupAdapter' in my settings.py, so clicking on the "Registration+" button shows a page that registration is disabled:

1. The page has a poor rendering, as far as I can see not css is referenced
2. A would prefer that I am able to hide the registration button

Is either of this possible to be fixed in the future?

Thank you and kind regards Torge