Bug 8196: FIX for Bug 5742: All extended attributes are shown when editing a patron

Bug 8196: FIX for Bug 5742: All extended attributes are shown when editing a patron

Test scenario:

1. make sure that you have ExtendedPatronAttributes enabled
2. open /cgi-bin/koha/members/memberentry.pl?op=add;categorycode=S0
   (you might need to modify categorycode according to your local config)
3. verify that you get all extended patron attributes in form

Signed-off-by: Dobrica Pavlinusic <dpavlin@rot13.org>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>