bug#25057: Ediff 2.81.5 of July 4, 2013; control panel frame location and focus broken

[Eli Zaretskii]

> From: aaron peterson <metaxis@gmail.com>
> Date: Mon, 28 Nov 2016 23:46:22 -0800
> 
> Invoking "ediff-buffers" starts ediff with no visible control panel, in
> either multiframe or plain.  There is a frame, but it is not visible.
> It can be minimized with (iconify-frame), and it is then visible in the
> dock, even showing the ediff help menu in the icon.

I can't reproduce this, so it might be a Darwin specific problem.

Thanks.