Reopen Cancelled AR Invoices or allow the changing of Cancellation Date

I believe we need a way to either reopen a cancelled AR invoice or a way of changing the cancellation date. At the moment, if an AR invoice is cancelled with the wrong date, the books are off in regards to the AR GL account. Allowing the change of the cancellation date would be much the same as changing the void date on a payment and reopening an accidentally cancelled AR invoice can help as well.