image-dired: Unreverse accidentally reversed menus

    * lisp/image-dired.el (image-dired-thumbnail-mode-map)
    (image-dired-display-image-mode-map, image-dired-minor-mode-map):
    In commits b905454680c7 and bed0373855ea, the menus were converted to
    use 'easy-menu-define', but they were reversed in the process.
    Unreverse the menus.

Eli and Lars, is the attached bug fix acceptable for 28.1?  This merely
reverses the menus and does nothing else.  The change as such is a
mechanical one, and after adjusting one two-line entry really just comes
down to a `reverse-region', so I think it should be safe.