Amazon removed from the favorite apps after an upgrade from 17.04 to artful

Upgrade from a default install of 17.04 to artful

Test Case
1. Install 17.04
2. Verify that the list of apps in the launcher is (in this order):
- nautilus
- firefox
- writer
- calc
- impress
- software
- amazon
- settings
3. Upgrade to artful:
update-manager -d
and follow the upgrade process

Expected results
The list of favorites is unchanged (same items and same order)

Actual result
Amazon is gone from the list.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-session 3.24.1-0ubuntu6
ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
Uname: Linux 4.10.0-22-generic x86_64
ApportVersion: 2.20.5-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Jul 3 14:38:03 2017
InstallationDate: Installed on 2013-09-03 (1398 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)