Bug 6945 [FOLLOW-UP] Add a link to show a MARC preview in the normal view

Bug 6945 [FOLLOW-UP] Add a link to show a MARC preview in the normal view

Adding the same MARC preview link to the section of the template
which is displayed when XSLT is on.

This revision also adds a unique id to the surrounding element in the
normal and XSLT versions.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>