Bug 35538: Sort OPAC self registration library list by library name

This patch modifies opac-memberentry.pl so that the list of libraries is
sorted by library name instead of library code.

To test, apply the patch and restart services.

- If using the default testing data you'll have to go to Administration
  -> Libraries and edit one or more libraries so that the library name
  is alphabetically different than the library code. e.g. Centerville ->
  Zanzibar.
- Go the OPAC and click "Create an account" (requires the
  PatronSelfRegistration system preference).
- Under "Home library," the dropdown of libraries should be ordered by
  library name.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 5998fe93f5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>

opac/opac-memberentry.pl

@@ -90,7 +90,7 @@ if ( $action eq 'create' || $action eq 'new' ) {
     $params = { branchcode => { -in => \@PatronSelfRegistrationLibraryList } }
       if @PatronSelfRegistrationLibraryList;
 }
-my $libraries = Koha::Libraries->search($params);
+my $libraries = Koha::Libraries->search( $params, { order_by => ['branchname'] } );
 
 my ( $min, $max ) = Koha::Policy::Patrons::Cardnumber->get_valid_length();
 if ( defined $min ) {