replace GUI popup menu with something more efficient

 This package allows one to replace the GUI popup menu (created by
 `x-popup-menu' by default) with a little temporary window (like that
 in which Dired shows you files you want to copy). In this window,
 menu items are displayed and labeled with one or two letters. You
 press a key corresponding to desired choice (or C-g if you wish to
 cancel the operation) and you are done.