ImageButtonDecoration: new image for menu button
ImageButtonDecoration: new image for menu button

Ignore-this: 3977c4bfcb4052e07321ec9e83f917c6

darcs-hash:20100402174910-594c5-c6c9576ca8b2b4c8a54604c586c75d5a81d86ba0

yzhou61/xmonad-contrib,yzhou61/xmonad-contrib,yzhou61/xmonad-contrib