Rework orphan/retired packages page
    
    This reworks this page a bit moving orphan / retired into seperate areas
    for better clarity. Also notes that no retirements should happen after
    final freeze has started and that during beta freeze, no retirements
    will take place, but once lifted they will all be processed.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>