Is it possible to create a precondition that unhides some hidden attribute?
The idea is to have an attribute which holds a comment when the user decides cancelling a work item, but maintaining this attribute hidden before the Cancel action. Of course, we can hide the attribute if it is null, but we need to show it at cancelling the work item. The problem is that I don't know if I can change this attribute presentation unhidding the attribute using the precondition script.