* 688_owner_machine: 688_owner_machine: feat: The owner of a domain can be changed via the options tab. issue #688

* 688_owner_machine: feat: user name's domain owner updates after changing it in the options tab. issue #688

* 688_owner_machine: fix: admin can access any settings. issue #688.

* 688_owner_machine: feat: Test for change_owner added. issue #688