Bug 27306: Add subtitle to return-claims-table

Bug 27306: Add subtitle to return-claims-table

To test:
-turn on claim returned
-find some items with a 245b or add a 245b to some items
-check those items out and mark them as claimed returned
-on the borrowers /cgi-bin/koha/circ/circulation.pl page look at the return-claims-table
-no subtitle
-apply patch and clear browser cache, restart_all
-now you should see the subtitle

Signed-off-by: Kelly McElligott <kelly@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>