WindowMaker: shorten creation of buttons for GroupGraph.
WindowMaker: shorten creation of buttons for GroupGraph.

fzadow/CATMAID,fzadow/CATMAID,htem/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,htem/CATMAID,fzadow/CATMAID