Store Emails (#3611)

* 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>

BTCPayServer.Client/Models/WebhookEventType.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
 namespace BTCPayServer.Client.Models
 {
     public enum WebhookEventType