Maps: go back to always typing 'image viewer'
    
    Loupe has replaced EOG on F39 and Rawhide, and it can be found
    with "image viewer", so let's just go with that. The rest of the
    logic should be OK but we will likely need some new needles,
    will do that next.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>