[Merge] lp:~khurshid-alam/unity-control-center/sharing-panel into lp:unity-control-center

[Khurshid Alam]

Laney also approved this on https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1741027/comments/9 (though it was for bionic)

so I ask him ?
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https://code.launchpad.net/~khurshid-alam/unity-control-center/sharing-panel/+merge/341306
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