Options for filing messages
A return of the move/copy to the messages context menu to allow easy filing of multiple or single messages. Drag and drop works, but is more error prone. Also could have a move button on the message window that ties in with a drop down of favourite folders.
Dan Davis commented
On Android OS 4.1.1 (on a PC-on-a-stick, Probox2) drag and drop to folders in Mail doesn't work, touch or with keyboard/mouse. Doesn't work with iOS 5.1 on an ipad, either (haven't tried iOS 6).