[Merge] lp:~albertsmuktupavels/nautilus/white-screen-fix into lp:ubuntu/nautilus

[saltmakrell]

Several people have tested this patch and it works flawlessly! It should definitely get accepted.

We (users of multiple X screens) have been waiting too long for a usable Ubuntu-out-of-the-box. It is a good temporary fix until compiz takes over the role as the background drawer.
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https://code.launchpad.net/~albertsmuktupavels/nautilus/white-screen-fix/+merge/180231
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