[Pharo-project] refactor instance variables

refactor instance variables | accessors used to figure out which instance variables needed to be added and give you a chance to accept or reject the proposed list. After loading the latest updates, it now presents a list of instance variables, letting you pick one and only one to add. The new behavior is very awkward when you've just added several iVars to a class. The old behavior was too "all or nothing". I'd love to see one that presented all of the proposed accessors and let you accept them all or reject selective accessors. -david