I apologize if this is frequently answered; I couldn't find it anywhere.
I'm using a Passport on 10.3.1154. So far I can do basically everything in the hub from the keyboard, which I prefer. However, I cannot find a way to just close the current email/bbm/text and return to the hub without swiping or finding the back button. Is there any kb shortcut that will close the email (without deleting/flagging/etc the email)?