Have the handin button match the styles of other toolbar buttons, including correctly working when the toolbar is not horizontal.
Have the handin button match the styles of other toolbar buttons, including
correctly working when the toolbar is not horizontal.

svn: r11626

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