Don't show refund due when balance is owed on Additional Payments

[larssandergreen]

Before

If a contributor owes an amount on a contribution, if you click Record Refund, the form incorrectly shows Refund Due: $N when $N is actually the balance owed. The amount field is also set by default to the balance owed when you are in fact recording a refund.

The Submit Credit Card payment submit button says Record Payment.

After

If the contributor owes an amount on a contribution, if you click Record Refund, the form correctly shows Balance Owed: $Ninstead of Refund Due: $N. The amount field is only set by default if there is a refund due.

The Submit Credit Card payment submit button says Submit Payment.

Comments

$this->_owed and $this->amountDue are the same when $this->_owed is TRUE, so no need to check both.

[civibot]

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