> Hmm, cmdGesturesEnabled seems to control lots of independent behavior. Maybe we need more fine-grained settings?

I guess the main hurdle as I see it is that halos are considered in 
disableProgrammerFacilities to be part of a programmer tools, not user ones.

Maybe adding a preference saying "my app is using halos" would do it. 
Then in Morph>>#handleMouseDown: we could have something like


	(anEvent blueButtonChanged
		and:[Preferences cmdGesturesEnabled
			or: [Preferences myAppUsesHalos "tmp name"]])
	ifTrue: [^ self blueButtonDown: anEvent].


Stef