Show errors during execution of EMF commands to user
Modifications of the model are managed by the
ICommandStackService. As of now, in case the code inside commands fails and raises an exception, the problem is only logged to the console, but not shown to the user.
This is problematic, since a major reason for such failures are input models that do not satisfy the assumptions of the command.
Suggested change: show message explaining the problem in a dialog box.