Undo/Redo: Show the action that will be taken
It would be nice if the Undo/Redo menu entry could show the general action being taken (like "Undo: Move File").
Maybe the statusbar and tooltip (of the toolbar icons) could even have more detail about the folder/file the action will affect.
Here are Caja (which gives details in the status), Gimp, and Nautilus as examples: