re SlicerIGT/SlicerIGT#18 fixed the test
re SlicerIGT/SlicerIGT#18 color light blending green, labels instead of number for toolbar
re SlicerIGT/SlicerIGT#18 toolbar hash with one element per watchdog node, hide show toolbars from menu, clean up when node erased
re SlicerIGT/SlicerIGT#18 icon to show hide toolbar, delete trash icon remove tool