Automatically send invoices and proposals via email

🤩 Awesome! Sometimes it's crazy what needs to be done for a alleged functions like send an email ^^

if you do this feature, please with a single click plus an editable preview of the mail. in order to be able to add custom text. it would be nice, if the emailtext could be stored as a template within the customer's profile, so each customer can have an individual mail-text. plus one global mail-text for those customers i hadn't checked the "custom mail-text" checkbox. in this way, one can personalize emails with the appropriate social vibe, you have with a particular customer.