Bug 12696: Remove CGI::scrolling_list from C4/Reports.pm

Bug 12696: Remove CGI::scrolling_list from C4/Reports.pm

This patch removes only instance in this file.
Problem is that there are many template files
involved. Most of them have other instances of
scrolling_lists but is a problem for other bugs,
they will depend on this.

What is replaced is a pulldown for delimiter choices.
In all but one case the code is the same (variable name change),
and I did a little tidy of the TT code

To test:
1. Apply the patch

In all the following cases, check delimiters pulldown (Output box, bottom right)

2. Go to Reports > Statistics wizard > Acquisitions
3. Go to Reports > Statistics wizard > Patrons
4. Go to Reports > Statistics wizard > Catalog
5. Go to Reports > Statistics wizard > Circulation
6. Go to Reports > Statistics wizard > Serials
7. Go to Reports > Statistics wizard > Holds
there is a bug here, pulldown next to this must show 'CSV' option,
but shows nothing. Will be fixed

8. Go to Reports > Other > Average loan time

9. Go to Reports > Top lists > Patron checking out the most
Here there is a 'Delimiter' label before delimiters, only case
10. Go to Reports > Top lists > Most-circulated items

11. Go to Reports > Inactive > Patrons who haven't checked out
There is and inconsistency here, name of option on reports page,
and name on this report, 'Patrons with no checkouts'

Followed test plan. Pulldowns display as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works as described, passes tests and QA script.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>