F18293 local settings
Partially implements #18293:
- options moved to provider: enable, create user, unlock user, default user groups
- options already at provider level: scopes
- options moved to plugin/ce config: storage pages
Left open:
- move to provider: forward callback credentials (waiting for JWT)
- move to provider: language parameter (not clear how to get preferred language)
- move/add to plugin/ce: redirect url on success & error (needs a concept for reporting errors)
- combine frontend & backend tabs on extension settings