Copy from Snapshot removes elements it shouldn't

whilst I agree that some areas should be flushed when you use a snapshot to take a copy, the whole purpose here I believed was that we could start a new plan based on a snapshot that included all the "important" data i.e. the requirements, test cases and the ENVIRONMENTS

We flush the schedules - agreed but we should not be flushing the environments - or at least prompt to see which sections the users want flushed on the copy.