[Bug 47844] Add a dual-screen Wine VM

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47844

--- Comment #2 from François Gouget  ---
One positive point: multi-head does not seem to break screenshots for Linux
guests. Maybe because they run vdagent. Even better, the screenshot contains
both screen.

I also tried Xinerama mode, i.e. configuring the VM with two QXL graphics
cards, in an attempt to avoid the issues mentioned in the previous post.
However I could not get it to work with fvwm.