Bug found by:

Bug found by:
Submitted by:
Requested by:
Reviewed by:
Approved by:
Obtained from:

Do not show odd grid lines when zooming is set to or lower than 50%.

Refactor TopoGen procedures so that they can operate on already
existing nodes.

Implement utilities for connecting selected nodes in a chain, star,
cycle or clique topology.  The functions are accessible when
holding the right button over a selected node.

Minor indentation cleanups.