navigation: return to message, not inbox, after reading message
When reading a message in a separate tab, if I reply to the message (or forward it), I should return to the message tab after I send the reply (or forward). I should not go to the inbox. Usually after replying to a message, I want to delete it. Going back to the inbox means that a quick delete button press removes a message from my inbox, and I have no way of knowing which one it was. I also have no undo ability to restore it, so my only recourse is to try to figure out which message got deleted. An undo feature would be great, but simply returning to the message tab (instead of the inbox) would fix this too.
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