Behaviour: remove sync to head for unshelve step
Current workflow for review is to: sync the change, or label provided then overrides this with a sync to head, before unshelving the content — forcing the resolve step.
Removing the second sync allows users to determine the resolve point, although they might not be able to submit the shelf without a second resolve.
Old behaviour can be restored by fixing the review ‘change’ parameter to ‘now’ a Perforce builtin revision.