* Enhance Store email capability
Currenty the new email rules can send an email when an invoice event occurs. However, there is currently no way to customize the email based on the invoice, making the feature a bit useless.
This PR:
* adds the rich text editor to the body input
* allows you to use some of the properties from the Invoice (based on greenfield api properties. I've taken a imple approach for now using just a string.replace mechanism, but we can update this to a dynamic linq approach so that users can customize further (e.g. `{Invoice.Metadata["something"].ToString().ToUpper()}`)
NOT READY:
Since this all takes place as a background service, there is an issue around how to handle items such as the "checkout link", as we are not aware of the btcpay url at that moment. Thoughts? @nicolasdorier
* fix typo and make it simpler for now
* remove dditor
* Store Emails
* fix test
* Update email rules layout
* Cleanups
* Test cleanups
* Add back comments
* Update view; add test
* Show email rules link even if email settings aren't completed
* Validate email addresses
* No redirect, display warning
* Fix test
* Refactoring: Change email argument types to MailAddress
* Test fix
* Refactoring: Use MailboxAddress
* Parse emails properly in controllers and backend
Co-authored-by: Dennis Reimann <mail@dennisreimann.de>
Co-authored-by: nicolas.dorier <nicolas.dorier@gmail.com>
