DFHack/dfhack — pull request #316 by eswald (2014-09-05 03:09:38+00:00)
Title: Removing new trade hotkeys while a counteroffer is displayed.

Fixes http://www.bay12forums.com/smf/index.php?topic=126076.1140
It's tempting to use has_offer for this effect, but that flag remains true after hitting Enter to consider the offer.
Relies on a structure update: https://github.com/DFHack/df-structures/pull/18