Bug 9239 QA follow-up: fix highlighting and merge error

Bug 9239 QA follow-up: fix highlighting and merge error

QP searches with && broke search highlighting on the OPAC details page.
This patch corrects encoding of the query_desc parameter that is passed
to the details page.

My last attempt at rebasing also transposed the variable for index
names with the variable for operators, meaning that the dropdown in
the basic search did not work.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Fixes some problems raised during QA successfully.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>