JFH prevents dealing with less than a whole title

When there is a current Joint Family Homes (JFH) memorial on the current view of the title this checks that all registered owners are dealing with the land. If all registered owners are affected in the transfer the JFH memorial will be removed. If not, all registered owners are affected, this business rule will fail.

Checks if there are any prior instruments within the same dealing that will cancel the current JFH.