Bug 14267: How active is active?

Bug 14267: How active is active?

git grep on function active in additem.tt:
koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt:function active(n
koha-tmpl/intranet-tmpl/prog/en/modules/serials/serial-issues-full.tt:active([%
koha-tmpl/intranet-tmpl/prog/en/modules/serials/serial-issues-full.tt:function a
koha-tmpl/intranet-tmpl/prog/en/modules/serials/serial-issues-full.tt:
t/Cache.t:      unless ( $cache->is_cache_active() && defined $cache );
t/Cache.t:          unless ( $cache->is_cache_active() );
Conclusion: active in additem seems to be quite inactive.

Test plan:
Add, edit or delete items and verify that you did not miss active :)

NOTE: The active function has a loop which is always run.
      Inside that loop 'ong' would always be defined as some number
       concatenated with XX.
      Both sides of the if/else reference document.getElementById(ong),
       but there is only one occurence of XX in the file: the concatenation!
      Similarly, the 'link' logic does not correspond to any of the
       id= or name= strings in the file.
      koha-tmpl/intranet-tmpl/prog/en/modules/admin/marc_subfields_structure.tt
       is the only file with "id=\"link" that matches the logic.
      This is likely a cut-and-paste remnant made useless by datatable upgrades
       and HTML/CSS class changes.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>