closes#8645, closes#8710
- locked users were once part of the category "active users", but were moved to the inactive category
-> we have added a protection of not being able to edit yourself when you are either suspended or locked
- but they are not really active users, they are restricted, because they have no access to the admin panel
- support three categories: active, inactive, restricted
* - revert restricted states
- instead, update permission layer: fallback to `all` by default, because you are able to serve any user status
- add more tests
- ATTENTION: there is a behaviour change, that a blog owner's author page can be served before setting up the blog, see conversation on slack
-> LTS serves 404
-> 1.0 would serve 200
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