Dear All, Hi!
Previously, the ctxpopup have used only direction up or down if there is no
enough area to display.
So, there was some dead codes and TODO list for this..
By using wd->horizontal, we can decide between "up/down" and "left/right"
If elc_ctxpopup is horizontal, "up/down" is more proper than "left/right"
and vice versa.