Bug 7357: display serial title instead of '---'

Bug 7357: display serial title instead of '---'

The full title of a serial is now displayed even
if several lines have the same title.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit cb1a9466931790bbe3aac19845a3c7b441e43ea2)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>
(cherry picked from commit eec9246f267e063bc1d3589a8303dcb1eb0de7fa)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>