X.C.Prime: add ifThenElse binding
X.C.Prime: add ifThenElse binding

This is necessary for if-then-else support in the user's config.

mathstuf/xmonad-contrib,f1u77y/xmonad-contrib,xmonad/xmonad-contrib,CaptainPatate/xmonad-contrib,f1u77y/xmonad-contrib,CaptainPatate/xmonad-contrib,0/xmonad-contrib,CaptainPatate/xmonad-contrib,ohlus/xmonad-contrib,0/xmonad-contrib,xmonad/xmonad-contrib,ohlus/xmonad-contrib,mathstuf/xmonad-contrib,ohlus/xmonad-contrib,0/xmonad-contrib,pjones/xmonad-test,mathstuf/xmonad-contrib