Bug 18596 - Quick add form duplicating password confirm

Bug 18596 - Quick add form duplicating password confirm

To test:
1 - Add password to BorrowerMandatoryField
2 - View quick add form
3 - See confirm password twice
4 - Apply patch
5 - See confirm password once
6 - Add password to QuickAddFields
7 - Confirm one confirm field
8 - Remove password form BorrowerMandatory field
9 - Confirm there is one confirm field and password fields are not
required

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>