Bug 12698 - If user changes home library in Opac change is not visible in staff client

To test:
- Set opacuserlogin and OPACPatronDetails to allow
- Log in to OPAC, go to 'your personal details'
- Change Home library
- Go to staff client: Patrons requesting modifications (/cgi-bin/koha/members/members-update.pl)
- Without patch, you do not see the change request, but can Approve, Deny or Ignore it
- With patch, you see the change request, indicating the Home library (branchcode)

Signed-off-by: Nick Clemens <nick@quecheelibrary.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
I "slightly" rewrote the patch so it applies on current master.