Where appropriate, update references to geomview license too,
now called COPYING.geomview.

Once we pick a license this might change, but
in the mean time, at least the NCSA UIUC origin is noted.

Warp pointer under X.
And, justify numeric labels so they're always visible.

This really needs to be done in an intermediate superclass!
All these changes really in previous revision; just missed typing in comments then.

Let parent class handle events too.