software updater: dialog unreadable with details

[Guntbert Reiter]

In the dialog that you get when some ppa is not available the "details" are unreadable (see screenshot)

 i.e. the textbox is much too small

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: software-properties-gtk 0.96.24.7
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Oct 14 22:51:06 2016
ExecutablePath: /usr/bin/software-properties-gtk
InstallationDate: Installed on 2014-07-08 (829 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: Upgraded to yakkety on 2016-10-14 (0 days ago)

[Launchpad Janitor (janitor)]

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