This is disappointing, please put "compose messages in tabs" back into your work flow plan. I've been looking forward to the new update and having all messages showing in tabs, whether opened, in composition, or as a response.Thank you.
Please add the capability to compose new messages and reply to messages in a tab, not a free-floating window. The floaters alway moves behind all other open wonders, forcing me to dig for it if I don't finish the response or new message all at once ...