Minor issue:
d.nviz and xganim buttons from a new d.m window with no map layers
causes errors in the terminal window. Needs a test at the start of the
script(s). Add a test for xganim existance as it isn't always built.
I agree pan, zoom buttons are slightly huge now.
Show vector columns to xterm with background color of d.m is very nice
in practice.
Hamish