What's really messed up is that Shift-D is Damage Cleanup when a worker is selected, and Diplomacy when a non-worker unit iis selected!
Should have just made it Ctrl-Shift-D period. Or better yet, modify the Ctrl-P to be Pollution/Cleanup damage.
Should have just made it Ctrl-Shift-D period. Or better yet, modify the Ctrl-P to be Pollution/Cleanup damage.