Payment reminder based on due date

[Terminator-Barbapapa]

Since we now have the due date setting in the PDF Invoices plugin I think it would be great if we could provide users with a way to setup a payment reminder based on this due date with one click, using our Smart Reminder Emails plugin.

The plugin should detect that PDF Invoices is active, and a due date is set. It should then display the payment reminder, all set up, but in draft. We could create a payment reminder with two triggers. For instance one in 30 days and one in 60 days. We could also set up an additional admin email that will be sent when there is still no payment after 90 days. Notifying the shop owner to take action. Both reminder emails will be set up in draft, so the user can customize them when necessary.

In the settings I think we could use the same text with a slight layout change, based on if the Smart Reminder Emails plugins is active or not.

Smart Reminder Emails is not active: Show a note with a link to the product page and a link to a guide on the documentations site.

Smart Reminder Emails is active: Turn the note into a button and remove the link to the product page.