Bug 9457: [ENH] Ordering branches should be case independent (2)

Bug 9457: [ENH] Ordering branches should be case independent (2)

This patch replace use of CGI::scroll_list() to show list of branches.

In two files, marc21_linking_section.pl and unimarc_field_4XX.pl,
the scrolling list is created but not used in the template file,
so the code is removed.

Also minor renaming/normalizing of variables.

To test:
1) Install with some branches, records and patrons

2.1) Select a record, click 'Place hold', select user,
     there is a library pull-down next to 'Pickup at:',
     list is ordered case sensitive
2.2) Go to Reports > Average loan time,
     next to Library is a pull-down,
     list without order
2.3) Go to Reports > Catalog by item type,
     next to 'Select a library' is a pull-down,
     list is ordered case sensitive
2.4) This is tricky, go to Reports home,
     change last part of URL 'reports-home.pl' with
     'manager.pl?report_name=issues_by_borrower_category'
     (can't find a direct link), next to 'Select a library'
     is a library pull-down,
     list without order
2.5) Edit/Add a patron, on section 'Library management'
     there is a library pull-down, case sensitive
2.6) OPAC, as logged user, make a suggestion or hold,
     there is library pull-down, correct order

3) Apply the patch

4.1) Repeat 2.1), correctly ordered list
4.2) Repeat 2.2), correctly ordered list
4.3) Repeat 2.3), correctly ordered list
4.4) Repeat 2.4), correctly ordered list
4.5) This is a bit more work
     There are 3 possible situations to test:
     A) No branches, must show a message that are no
        libraries defined
     B) New patron, must show a correctly ordered
        list of branches, current branch selected
     C) Edit patron, must show a correctly ordered
        list of branches, patron branch selected
4.6) Small changes on variable names, so retest 2.6)

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>