Doesn't work changing scaling for menu and title bars with keyboard

[Thomas Novin]

If you change scaling for menu and title bars with keyboard arrows, instead of using the mouse to change the value, nothing happens. The value is changed but the scaling is never changed, not even after doing apply.

If you change the slider with the mouse, the value is applied instantly.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-control-center 14.04.3+14.04.20140328-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-22.44-generic 3.13.8
Uname: Linux 3.13.0-22-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr 6 23:47:45 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-03-26 (11 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140325.1)
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_unity-control-center:
 activity-log-manager 0.9.7-0ubuntu12
 deja-dup 30.0-0ubuntu4
 gnome-control-center 1:3.6.3-0ubuntu54

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.