Better format of files-by-directory menus.
Split big menus into sub-menus. (msb-max-menu-items): Changed default value. This variable now depicts the maximum number of items in a sub-menu. (msb-display-most-recently-used): Changed default value. (mouse-select-buffer): Now handles several levels of sub-menus. New format on return value.
Showing with 116 additions and 77 deletions