new .desktop filename as of yelp 49
[org.gnome.shell]
-favorite-apps=[ 'firefox-esr.desktop', 'org.gnome.Evolution.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'org.gnome.TextEditor.desktop', 'org.gnome.Calculator.desktop', 'yelp.desktop' ]
+favorite-apps=[ 'firefox-esr.desktop', 'org.gnome.Evolution.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'org.gnome.TextEditor.desktop', 'org.gnome.Calculator.desktop', 'org.gnome.Yelp.desktop' ]