regression: unity-control-center doesn't save/restore screen scaling correctly

[Tessa]

Since upgrading from 16.04 to 16.10, I've noticed the following regression: screen scaling settings in the unity-control-center screen panel aren't correctly restored after a reboot or a re-login. I've got multiple monitors at different scaling factors, so this is quite a usability issue for me.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: unity-control-center 15.04.0+16.10.20161003.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Nov 2 11:07:51 2016
InstallationDate: Installed on 2016-07-08 (116 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: unity-control-center
UpgradeStatus: Upgraded to yakkety on 2016-10-31 (1 days ago)