XWIKI-9789: Inconsistency between the user scope and the "users" section in the administration of a subwiki.

(cherry picked from commit 09fdce639199e0e5b343e2b5140c7c1d6a24ae00)
XWIKI-9789: Inconsistency between the user scope and the "users" section in the administration of a subwiki.

(cherry picked from commit d6c8fd0d3c2001fa2ffd0a0cbc684c7928792ed9)