[Merge] lp:~ubuntu-mate-dev/compiz/mate-tweak into lp:compiz

[Marco Trevisan (Treviño)]

The proposal to merge lp:~ubuntu-mate-dev/compiz/mate-tweak into lp:compiz has been updated.

Commit Message changed to:

mate: Avoid artefacts of Windows Thumbnail Previews

For more details, see:
https://code.launchpad.net/~ubuntu-mate-dev/compiz/mate-tweak/+merge/324004
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