Small issue and patch for the Panel

[Jasper Huijsmans]

Joao Pedrosa wrote:
> Hi,
>
> Xubuntu's Xfce has a little issue with displaying the
> menu of the items of a launcher in the right monitor
> in a dual head system (mine ;-).
>
> I decided to try to dig a solution on my own, and
> thankfully the solution followed the same idea of the
> WindowList plugin.
>
Hi. Yes, this is a bit later than I would have liked :( But, I
did commit the fix just now, so it will be in the final 4.4.0
release. Thank you very much.

cheers,

    Jasper