Features:
Undo
Non-simple background polygons
Menu label indicating active graph
Specify selection by path or polyline
Allow user control of max. node size

Multiple views
GUI for canned gvpr programs
Additional edge attributes : dash/dotted, width
Multiedges
Mechanism for semantic zoom
  separate overlapping nodes
  add more detail

Bugs: 

Labels don't appear when alpha colors are enabled 
Edges should not disappear when node is off screen ?
Re-fix 3D navigation
Clean up apply buttons - which are necessary?
Make sure all buttons do something or remove them
Trap "window close" on Smyrna Settings widget, or fix problem
