Prevent a crash when deleting objects accessed from a list of their abstract class (i.e. Select some Contacts, "delete...", select a Person, delete => crash).
Prevent a crash when deleting objects accessed from a list of their abstract class (i.e. Select some Contacts, "delete...", select a Person, delete => crash).

ucbpi/itop,ucbpi/itop,ucbpi/itop,ucbpi/itop,ucbpi/itop