Shortcut for Move

You allow certain keyboard shortcuts. "Move to folder" isn't one of them but it often used. There are two places that seem most apparent: At the top of an open message you have an icon of a folder with a + sign, but this is for "copy". Why not add one additional icon for Move or allow the use to select the option for that icon shortcut. The second place is the small mini-drop down menu available in any open message. This mini-drop down menu contains many options for operating on the message so why not make "Move" one of them? I suggest that most people want to move their messages more than copy. Thanks.