Be able to apply a credit memo to multiple invoices and have a record of which invoices the credit memo was applied to.
Example, if we have CM100 for $2,000 and we apply it to Invoice 101 that has a balance of $200, it will show a remaining credit of $1,800 but show it as "Open Credit"
Currently, we note the credit memo on the invoice we apply it to.
Perfect world would be to click on a credit memo and show a breakdown of each invoice it was applied to.