slapos_jio: update panel and use PNG logo instead of hardcoded base64 logo

5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:00:54

passed SlapOS.Eggs.UnitTest-Master.Python2

00:16:20

failed SlapOS.Eggs.UnitTest-Master.Python3

00:09:19

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:27

failed SlapOS.Eggs.UnitTest-Master.Python3

00:14:11