Make the Remittance Letter email wizard dynamic
Created originally on Bitbucket by Anonymous
The Remittance Letter email wizard currently has 2 read-only lists: list of unique partners and list of selected vouchers.
The former could be writable to allow changing a partner's email; but it shouldn't be possible to add or to remove a partner.
The latter could be writable to modify the list of vouchers but 1) it should only list posted vouchers and 2) the partner list will have to be synchronized with the voucher list.