Top bar in GNOME Shell should say "Install Ubuntu GNOME" or "Install" not "Ubiquity"

When the installer is opened in Ubuntu GNOME's live session, it show up in the top bar as Ubiquity. I believe this name is determined by simply capitalizing the binary name (/usr/bin/ubiquity). I have noticed this in other Python apps (but not all of them) such as Gpartedbin and Apport-gtk. The "Ubiquity" name also shows up in the Alt-Tab window switcher and the left sidebar ("dash") of the Activities Overview.

Instead it should say either "Install" or "Install Ubuntu GNOME 13.10"

See also bug 1203223.

Possible fixes
------------------
- http://stackoverflow.com/questions/9324163/how-to-set-application-title-in-gnome-shell
- http://stackoverflow.com/questions/13904819/how-can-i-set-app-title-after-loading-ui-using-gtk-builder-in-python
- Switch to GtkApplication

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubiquity 2.15.11
ProcVersionSignature: Ubuntu 3.10.0-3.12-generic 3.10.1
Uname: Linux 3.10.0-3-generic x86_64
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
Date: Fri Jul 19 20:23:19 2013
InstallationDate: Installed on 2013-06-14 (35 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Alpha amd64 (20130613)
MarkForUpload: True
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)