from preamble:

"Change Set:		MenuInvFix-nk
Date:			1 August 2002
Author:			Ned Konz

This change set fixes a couple of performance
problems with menus:

* Menus were being added to the world and then re-positioned, causing
the upper left hand corner of the world to be re-drawn unnecessarily.

* Updating menu items were always being redrawn, even if they didn't
change.

"!
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