ui: container guest status: show privileged status as new row

ui: container guest status: show privileged status as new row

As that info is not available through the store (which stores the
status), it must be fetched separately.

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>
Reviewed-by: Dominik Csapak <d.csapak@proxmox.com>
Tested-by: Dominik Csapak <d.csapak@proxmox.com>
 [ TL: rework subject and avoid arror-fn for controller to keep `this`
   working, as reviewed by Dominik ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>