So it can play with the same mechanism as O/ECompletion does.

Attached is a changeset with a little class.

I'm not sure how to package it yet, but I think it has to be packaged along with SelectorChooserMorph and others.

It's related to this issue: http://code.google.com/p/pharo/issues/detail?id=439&q=cmd%20q&colspec=ID%20Type%20Status%20Summary%20Milestone%20Difficulty

Guille