For some cases, I would like to submit orders using a shipping / billing address that is different from the standard shipping and
billing address (defined in the administration or customer account) WITHOUT marking these - so to speak - "temporarily" used addresses the new standard.

So, whenever an address < > the standard address is used to execute an order, it should change back to standard
once that order has been submitted (or the session got closed). Currently, if a new address has been added by a contact it automatically
gets marked as new "standard shipping / billing address" and gets pre-selected from now on.