update-manager does not actually restart when asked

[Humphrey van Polanen Petel]

When update-manager concludes that the system needs to be restarted in order to complete some update, it displays a panel with the options <restart now> and <restart later>. Selecting the option <restart now> does not restart the system, but instead displays the common shut-down panel with the two big boxes <restart> and <shut down>. This is wrong. When the option <restart now> is selected, update-manager should initiate system restart directly.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: update-manager 1:0.196.14
ProcVersionSignature: Ubuntu 3.16.0-62.83~14.04.1-generic 3.16.7-ckt23
Uname: Linux 3.16.0-62-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Feb 28 10:48:30 2016
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'484'
 b'com.ubuntu.update-manager' b'launch-time' b'1456609943'
InstallationDate: Installed on 2015-09-08 (172 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)