Bug 12655 [Revised] PROG/CCSR deprecation: Correct hard-coded opac-tmpl/prog path...

Bug 12655 [Revised] PROG/CCSR deprecation: Correct hard-coded opac-tmpl/prog path in XSLT

Two XSL files in the bootstrap theme contain hard-coded paths to the
prog theme directory. This patch adds a query of the opacthemes system
preference and builds the path based on the returned value.

To test in a MARC21 system:

Create or locate a record which contains a subject which is linked to an
authority record. View the detail page for that record in the bootstrap
OPAC and confirm that there is a magnifying class icon next to the link
for that subject heading. Inspect or right-click the image and "View
image" [FF. "Open image in new tab" in Chrome] to verify that the image
being shown is from the bootstrap theme directory.

Also modified: The NORMARC XSL for the detail page which has been
changed in the same way. I did not test it in a NORMARC catalog.

Edit: Fixed copy-and-paste error causing duplicate image.
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>