X.H.Focus: Adapt docs to the new activation interface
X.H.Focus: Adapt docs to the new activation interface

Fixes: https://github.com/xmonad/xmonad-contrib/issues/396
Related: https://github.com/xmonad/xmonad-contrib/pull/192
Related: https://github.com/xmonad/xmonad-contrib/pull/128

xmonad/xmonad-contrib,xmonad/xmonad-contrib