update manager details window is too short

[Fernando Fernandez]

The details window is showing but it's only one line tall. See screenshot.

$ lsb_release -rd
Description: Ubuntu 16.10
Release: 16.10

$ apt-cache policy update-manager
update-manager:
  Installed: 1:16.10.7
  Candidate: 1:16.10.7
  Version table:
 *** 1:16.10.7 500
        500 http://archive.ubuntu.com/ubuntu yakkety/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu yakkety/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: update-manager 1:16.10.7
ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb 3 09:22:57 2017
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'586'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'989'
 b'com.ubuntu.update-manager' b'launch-time' b'1486113595'
InstallationDate: Installed on 2016-05-16 (262 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to yakkety on 2016-10-29 (96 days ago)

[Launchpad Janitor (janitor)]

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