XMI Delta CAS serialization does not write out FSes indexed in the Initial View which does not have a sofa

I found a bug in the XMI CAS serializer where delta CAS serialization does not properly handle FSes that were modified in the _InitialView, where the _InitialView does not contain a sofa. This improper handling results in feature structures being recorded in the XMI, but are never indexed in the _InitialView. Since the FSes aren't indexed, XMI deserialization does not add these FSes to the _InitialView of the CAS.