- the list opens the preview, which shows one status hint (banned,
deactivated, not activated, suspended) and the IP address fields
- bulk actions activate, deactivate, restore, ban and unban; record
actions activate, unban and unsuspend, offered while they apply
- delete (form button and bulk) removes the user for good with the
throttle rows, group memberships and attachments in one transaction;
blobs go after the commit
- a privileged-group member is still refused, a bulk delete as a whole
- admin harness: boots the plugin with the admin API mounted and
mints backend administrators with chosen permissions
- TestAdminUsersTracer and TestAdminPrivilegedMember
