I've created a custom role with the following command:
pveum roleadd PVETest -privs "VM.Backup Datastore.AllocateSpace VM.Config.CDROM VM.Console VM.PowerMgmt"
Then I've added that role to user "oktay@pve": http://i.imgur.com/k1RigtV.png
However, when I login with that user, I cannot see the...