Bug#199520: metacity: Poor interactions with Xinerama

[Daniel Givens]

Running Metacity 2.12.2 in Unstable here.

Windows seem to try to open under the mouse pointer when they can.
Sometimes, a program such as BMP will remember it's last location on
the desktop and open there. For the vast majority though, it seems
that programs will open up either under the mouse pointer or at least
on the same screen.