Fix bug in L.TrackFloating
Fix bug in L.TrackFloating

Ignore-this: 2c3902ea9f1d70a7043965c8aa99891d

Addresses the comment that:

If the focus goes from the floating layer to tiling by deleting a floating
window, it's again the master window that gets focus, not the remembered
window.

darcs-hash:20101030000620-1499c-fedd38718bbcaaac77dae90f13aae2c5f66fa6a0

kmels/xmonad-launcher,kmels/xmonad-launcher