gmoccapy_1_2_1 - minor layout changes due to change to XFCE

ver. 1.2.1
- due to the behavior of XFCE of the new hybrid.iso I
  had to change the width settings of several button
  to stretch them to fit some text and images
- The same reason forced to set new default startposition
  of the main window and the notification messages.
gmoccapy_1_2_1 - added missing bracket in signals.py
Merge branch 'master' of git://git.linuxcnc.org/git/linuxcnc.git
Merge branch 'master' of ssh://norbert@git.linuxcnc.org/git/linuxcnc.git