some GUI progress

To date, we've had two views: wiki and rolonic. Some commands required the rolonic view, time navigation required the rolonic view (otherwise the time was not displaying) and the wiki view was not displaying the DescriptorUnit name when the Descriptors feature was turned on.

Now all this functionality has been moved to the wiki view, and the rolonic view has been dropped.

Should be a bit simpler to use.

Bill