Updated the label on the desk renewal global setting.

Updated the label on the desk renewal global flag circ.desk_renewal.use_original_circ_lib
to properly explain the it's the workstation library that will not be used rather than the
user home library. The OPAC renewal uses the users home library and desk renewals use
the workstation library.

Signed-off-by: Steven Callender <stevecallender@esilibrary.com>
Signed-off-by: Ben Shum <bshum@biblio.org>
Stamping 0849 - desk renewal description

Signed-off-by: Ben Shum <bshum@biblio.org>