Bug 30462: Separate Queued and Complete jobs

Bug 30462: Separate Queued and Complete jobs

This patch updates the background jobs management page to display
queued and completed jobs in their own tabs on the page.

JD Amended patch:
Fix QA failures:
 FAIL   koha-tmpl/intranet-tmpl/prog/en/modules/admin/background_jobs.tt
   FAIL   forbidden patterns
                forbidden pattern: trailing space char (line 158)
                forbidden pattern: trailing space char (line 256)
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>