E-Mails - When you use a template and then click on User default client allow it to take the text and a BBC to attach it to the opportunity etc

We have a number of email templates that we send and also an e-mail signature that goes from our email client. When we click on use default e-mail client we lose the standard document.

Also, if we click on use default client it would be useful to have the e-mail address to attach the document to the area of the CRM created from put in the BCC of the email