Possibiliy to convert email templates build in Unlayer to messages, also editable in Unlayer.

Email templates are built in unlayer. So are email messages (user.com/emails/messages/). Why are they not interchangeable?

It would be useful to be able to copy an unlayer-built email template to an email message and keep on editing it in ulayer. Right now it's only possible to copy the HTML code and paste it in a HTML message editor, however the end result is editable only in Grapes, not Unlayer.