Comment 6 for bug 255666

Verification done:

- before install app-install-data-commercial: followed the test case, launched gnome-app-install, switched to Third party applications and there's no zdesktop package there.
- after installed the app-install-data-commercial from proposed: followed the test case, launched the gnome-app-install, switch to "Third party applications", the zdesktop (Zimbra Desktop Installer) package is listed there, installing the package and while doing it a browser is open and redirected to the Ubuntu and Zimbra web page after filling the information and closing the browser the package is installed.