from preamble:

"Change Set:		savePrefsToDisk-sm
Date:			14 January 2002
Author:			Simon Michael

Add buttons to the preferences panel to save & restore settings to &
from disk, to facilitate transferring prefs from one image to another.
Also adjusts preferences panel layout and wording for clarity. This uses
the ExternalSettings mechanism; see also Jim Benson's more comprehensive
SavePrefs.cs. 

2002/01/14 - update for 3.2, incorporate asBoolean-sm, tweak preferences
panel layout and wording.
"!
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