Allow checkout of non-latest iterations

Allow checkout of non-latest iterations

Do not allow checkout of non-latest iterations

Throw an overridable conflict if a user tries to check out a non-latest iteration

There are three options possible. Do not allow the checkout of non-latest iterations. Allow the checkout of non-latest iterations for valid object types like CAD documents and their dependents. Present an overrideabl conflict when attempting to check out a non-latest iteration.