Bug 29051: Enable seen renewal in the staff client

Bug 29051: Enable seen renewal in the staff client

This patch updates the javascript for the checkouts table to add the
checkbox back in for the case where too_unseen is the error returned by
CanBookBeRenewed, allowing such issues to be renewed.

Signed-off-by: Caroline <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 91a67e3c8acd4d0cad73e01b10569c712b6b4c01)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>