Pre-store record validation before DELETE

When the user deletes a record:

1.	The record is locked. If the record itself contains subtype data, also the subtype record is locked.

2.	Foreground authorization is checked.

3.	Restrictive delete rules are checked.

4.	Restrictive, transitional, single-record constraints are evaluated.

At this point, the record is deleted. If the record itself contains subtype data, first the subtype record is deleted, then the supertype record.