gmoccapy_1_1_2 - scaling bug for jog wheel pin solved

ver. 1.1.2
- after changing units according to G20 / G21 the scales to be
  applied to the jog wheel pin (jog_vel and max_vel has not been
  changed, resulting in very large jumps after changing from
  metric to imperial, i.e. one count should move the slider 100
  increments in metric, but did that amount also in imperial,
  insteadt only advancing 4 steps.
- all sliders and vel infos are now changing according to G20/G21
  beeing active.
- There is still work to do on the offsetpage widget,
  IMHO it is buggy