WebUI: fix incorrectly shown links in association tables
    
    Previously all columns was shown as links, that was caused by setting
    link attribute of each column to true. This true value was there because
    of possibility to turn off links in whole table on self-service pages.
    
    Now only column which is primary key is set to be shown as link.
    
    https://pagure.io/freeipa/issue/7066
    
    Reviewed-By: Felipe Volpone <fbarreto@redhat.com>