[Merge] lp:~mitya57/metacity/3.12.0 into lp:ubuntu/metacity

[Dmitry Shachnev]

Thanks Alberts, actually I forgot that my branch was based on lp:~ubuntu-desktop/metacity/ubuntu, so I have resubmitted this to have the correct target.
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https://code.launchpad.net/~mitya57/metacity/3.12.0/+merge/226097
Your team Ubuntu Development Team is requested to review the proposed merge of lp:~mitya57/metacity/3.12.0 into lp:ubuntu/metacity.