gmoccapy_1_1_5_8 - iteration over None object message

ver. 1.1.5.8
- message at start because of
  return(PlasmaClass(halcomp, builder, useropts))
  instedt off
  return[PlasmaClass(halcomp, builder, useropts)]
  resulting in iteration over none object
Merge branch '2.6' of ssh://norbert@git.linuxcnc.org/git/linuxcnc.git into 2.6
gmoccapy_1_1_5_9 - corrected message system

ver. 1.1.5.9
- prepared yesno_dialog for user message,
  it does accept now pango markup
- wrong values in axis offset didn't show a message
  to the user, I fixed that