One to Many E-mail Attachments

I like the ability to add an attached file to e-mails sent from ClientSuccess. However, it is odd that within the completed engagement, the file is not shown. Therefore within ClientSuccess there is no record of showing what was attached to that e-mail.

Tasks allow you to attach and see that history. I would like to have the same ability in the e-mail function. Current function requires an extra step to add a separate engagement to add attachments one by one (having ability to add more than one attachment is important too!).