Bug 31881: Fix search link in MARC view

Bug 31881: Fix search link in MARC view

In framework a subfield can be defined with a link (with a search field).
This create an hyperlink in MARC view.
Currently with Elasticsearch the link does not work because search query contains 'field,phr:',
which is useless since the link contains 'idx=field,phr'.
With Zebra looks like the idx param is ignored.

Test plan :
1) Use Elasticsearch search engine
2) Edit subfield 245$a in default framework
3) Enter 'title' in 'Link'
4) Save
5) Create a record with default framework with 245$a = 'The Fifth Elephant'
6) Go to MARC view
7) Click on link in 245$a
8) You find the record

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>