c2c1131 webui: fix confirmation mixin origin check

Authored and Committed by pvoborni 9 years ago
    webui: fix confirmation mixin origin check
    
    Current check is not enough.
    
    https://fedorahosted.org/freeipa/ticket/4098
    
    Reviewed-By: Endi Sukma Dewata <edewata@redhat.com>