Further support this request.
The other big issue with pop-ups is that they do not work in private browsing mode. If I happen to have an urgent need to reply to an email when visiting family or friends, I typically prefer to use a "private" browsing window. Unfortunately, with the pop-up, the session does not carry over to the new window and I am unable to reply an email at all. The pop-up window does not contain the original message or any recipients.