Lesser changes (the comments in EdgeRescaleKContextMenu now actually
refer to rescaling, existing animo result panels should now be properly
closed when we open a new session, few other).
Mainly, a safety measure before starting to meddle with SUIDs in order
to use them properly in place of old name-based Cytoscape IDs: the
CySession.getObject methods (the one for old and the one for new models)
will help us make things work properly.