Bug 29020: Add link on the admin module

Bug 29020: Add link on the admin module

It works! P1 and P2 are inverted in the test plan, but
the principle that user with manage permission accesses
bg jobs from the admin page and user who do not only
have access through main page is there.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit ca55dc3e42c77f41f8c0cf66e6db9aeda4e66842)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>