Gmail has added a spanking-new keyboard shortcut, ‘e’, which archives the current conversation in the inbox every time, whether you’re viewing the message from the inbox or not. If you’re a big Gmail shortcut user, you’re no doubt familiar that the ‘y’ key already does archive, so what’s the difference? Well, if you think of everything in Gmail as labels (including the inbox), the ‘y’ key just removes the current label from the conversation—so if you view a message from a Follow-Up…