Bug 10672 - Add subtitle to display of checkouts, overdues, and holds on the patron...

Bug 10672 - Add subtitle to display of checkouts, overdues, and holds on the patron summary

In the OPAC, the patron summary page (opac-user.pl) should display
subtitle along with title in the lists of checkouts, overdues, and
holds. This patch adds it.

To test, log in to the OPAC as a patron who has checkouts, overdues, and
holds which include titles with subtitles. Titles should appear
correctly with and without subtitles.

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>