slapos_cloud: update default fields when displaying Computer or Computer Network

See merge request !286
7 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

00:51:15

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python2

00:09:22

passed SlapOS.Eggs.UnitTest-Master.Python3

00:10:43

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python3