Convert some old app-foundation usages to fedora-bootstrap
    
    This fixes several things that were still using CSS classes from
    app-foundation.css (which is no longer included, so they were
    not styled at all) to use fedora-bootstrap classes instead. It
    fixes alert boxes and converts 'labels' to 'badges'.
    
    Instead of fixing the 'alert-box' in layout.html's 'info' block,
    we just make the block empty: it is never actually displayed,
    because all the templates that inherit from it override it to
    an empty block. The text isn't accurate any more anyway, this
    app has existed for many years, it is not an 'early pre-release'
    any more :)
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>