Automatically send “Payment Received” email option

It would be really handy if, whenever a payment has been applied to an invoice, there was a popup prompt asking if the user would like to send a “Payment received” email.

I know that I wouldn’t want to send that email every single time, but I guess some people might also like to have an automatic option. So maybe the Sliced settings menu could contain a setting for “Send Payment Received email when payment is applied” with the options Never|Prompt|Always.

For both Prompt and Always options, the Send Email popup shouldn’t be shown (it should be sent “silently”), but it should show a notification when it has been sent which would be displayed in the same place as “Invoice 123 was viewed using the secure link”. (e.g. class: sliced_admin_notice_pay-rec-email_sent)

Originally mentioned here:
https://slicedinvoices.com/ticket/prompt-to-send-payment-received-email/

Thanks for your consideration!
Dax Liniere.