gmoccapy_merge changes of 2.6 to 2.7

ver. 1.3.2
- fixed a small bug PAUSE button did not get active on M01
  Thanks to Rick (LAIR82) for pointing on it.

ver. 1.3.1
- fixed very serious bug PAUSE / RESUME / STOP issue
  Program jumped to strange positions if STOP has been pressed
  while PAUSE was active.
  Thanks to Mael (papaours) for finding it.

ver. 1.3.0.1
- corrected a bug, toolchange velocity hal pin have not been
  initialized with values, if the user worked with the
  default values, so a probing with vel = 0 was possible,
  resulting in an error
- corrected an error in notifications.py, as the text to be
  displayed has not been checked for correct pango format, a
  message like "vel <= 0" resulted in an error. Now the necessary
  check is done

Signed-off-by: Norbert Schechner <nieson@web.de>