Clean keymask in GridSelect(solves issue 318)
Clean keymask in GridSelect(solves issue 318)

Ignore-this: 2c315539bf1ae8c427b7856b5fdb2e49

darcs-hash:20091021223404-7f603-1e20667b6fbcc50ada28c9de6059b13914b7357d

jthornber/XMonadContrib,jthornber/XMonadContrib