Direct Debits; changed logic where combining for the same Main Client

The logic behind combining Direct Debits for the same Main Client has been updated.

Previously, when this option is checked, other combine options are disabled and unchecked. This meant Regular, Additional, Promise and Other payments are shown separately and create separate Account Transactions.

This has been changed so that when this option is checked, other combine options are disabled and when saved are automatically checked.

This means payments for an Account are not split into multiple Transactions.