X.A.CopyWindow: add wsContainingCopies, doc cleanup
X.A.CopyWindow: add wsContainingCopies, doc cleanup

Ignore-this: 883899013707737d085476637a44695a
Use wsContainingCopies in a logHook to highlight hidden workspaces
with copies of the focused window. (refactored from original by aavogt)

darcs-hash:20090703011524-d17f0-c8e021f7ebaac815fcc51a797b642e50d2a74a3e

kmels/xmonad-launcher,kmels/xmonad-launcher