change X/Windows message-box checkbox spacing again: make the message region at least as large as the icon
change X/Windows message-box checkbox spacing again: make the message region at least as large as the icon

svn: r3304

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket