Batch Transactions; saving batch does not save AccountId if AccountPk only has been set

Saving a Transaction Batch using the finPOWER Connect Business Layer requires the AccountId to be set - if only the AccountPk is set, this information is lost.

A change has been made so that when saving a Transaction line, if the AccountId is blank but an AccountPk has been set, the AccountId is found and updated into the Batch.

Note, Saved Batches do not store the Account Pk, only the Id - as invalid Ids are allowed.