make NewTabbed use InvisibleMaybe to hide its cache.
make NewTabbed use InvisibleMaybe to hide its cache.

darcs-hash:20070926202330-72aca-a9536d23d1665b0ed73a3e0a53f4abbc06ce39b1

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