X.L.TrackFloating: Simplify by using X.U.Stack.findZ
X.L.TrackFloating: Simplify by using X.U.Stack.findZ

X.L.TrackFloating is more or less the same as X.L.StateFull's
FocusTracking, so it's no surprise the same helpers can be used...

xmonad/xmonad-contrib,xmonad/xmonad-contrib