add two new options: --app-icon and --dir-icon and fix bug in convert icon routine
update fvwm-menu-desktop2 manpage for the new options --app-icon and --dir-icon
rewrite of fvwm-menu-desktop2-config.fpl to add the new options of fvwm-menu-desktop2 and and help buttons
add 3 new FvwmForms for fvwm-menu-desktop2-config help
updated