Bug 6494 - opacmysummaryhtml on reading history

Bug 6494 - opacmysummaryhtml on reading history

This patch re-uses code and markup from opac-user.tt & .pl
to place the contents of the opacmysummaryhtml preference
on the circulation history page in exactly the same way
it appears on the "my summary" page.

The wording of the system preference description has
been modified to reflect this addition.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Works as advertised.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>