Keeping labels when the mail is sended

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=== PLEASE READ BEFORE FILING ISSUE:
https://code.google.com/p/gmail-delay-send/wiki/GmailDelaySendDebugging_8
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It's nor really an issue, it's more about a new version, add a functionality in 
the Project.

What steps will reproduce the problem?
1. Follow the instructions to create a draft to be send by GmailDelaySend
2. Add additionnal labels to organize theses mails
3. GmailDelay Send the mails
4. The mails do not keep their labels, and get the "Sent Mail" label only.

What is the expected output? What do you see instead?
no issues.

What version of the product are you using?
Last version.
I'm not developer, but as I understand in the code, to be Send, the program 
generate a "new" mail or copy without labels.

Please provide any additiona information below.

Is it possible to make this functionality?

Thank you,
Regards,

Bertrand

Original issue reported on code.google.com by bertrand...@gmail.com on 26 Nov 2014 at 3:09