bug#25818: 25.2; frame moved off display does not return (OS X)

[martin rudalics]

> You can evaluate this code from emacs -Q to have a frame gradually moved
> in steps of 200 px from position ((top . 1) (left . 1)) until it's just
> past the right edge of the display (more or less), and then come back
> again:
...
> On GNU/Linux and MS Windows the frame behaves as expected: when the
> frame parameters are changed to bring it back onscreen (step 2), the
> frame becomes visible again.  On OS X 10.6 the frame stays off screen,
> however, and I can't find any way to put it back on screen.  You can
> change the frame parameters for `top' and `left', and they'll stick, but
> they don't actually seem to have any effect.
>
> Can someone reproduce this on a more recent OS X?  Maybe the problem is
> fixed in newer versions.

FWIW this seems OS X specific behavior.  Compare

http://superuser.com/questions/55341/move-an-off-screen-window-back-on-screen-on-mac-os-x

http://osxdaily.com/2013/08/14/move-window-back-on-screen-mac-os-x/

http://www.gottabemobile.com/how-to-move-an-os-x-window-thats-stuck-off-screen/

http://apple.stackexchange.com/questions/709/how-to-retrieve-windows-that-have-moved-off-screen

https://www.cnet.com/forums/discussions/bring-misplaced-off-screen-applications-back-to-your-desktop-380285/

martin