Fix graphical update tests with some new needle variants
    
    The way GNOME Software displays an error after running into RHBZ
    1314991 has changed, it seems, so we need a variant needle to
    cope with that. Also, when an upgrade notification is visible,
    the 'Restart & Update' button for doing a regular update is
    shown in grey (not blue), so we need a variant needle to handle
    that too.