Bug 13188: Add PatronSelfModificationMandatoryField system preference

Bug 13188: Add PatronSelfModificationMandatoryField system preference

TEST PLAN:
1. Apply patch, updatedatabase, restart_all
2. In the  PatronSelfRegistrationBorrowerMandatoryField add the field password.
3. Go to the self registration page on make sure password is required.
4. Now go to the OPAC modification page, make some changes and attempt to submit. It should work.
5. Go to PatronSelfModificationMandatoryField and select some fields.
6. The columns you selected should now be required.
7. On the PatronSelfModificationMandatoryField page, make sure the select all and clear all buttons work.

Signed-off-by: Kelly McElligott <kelly@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>