LP#1436987: webstaff - fix patron search form

LP#1436987: webstaff - fix patron search form

This patch ensures that the patron profile and
search OU values are retained when going from a patron
search to a single record and back to the patron search.

To test the fix for this bug:

[1] Search for a patron using the expanded patron search fields,
    making sure to select values for the profile and search
    OU dropdowns.
[2] Open a record, then click "Patron Search" to return to the
    search form.
[3] Verify that the profile and search library are set and
    that the same patron records are retrieved.

This patch includes elements from a patch originally written
by Victoria Lewis <vlewis@catalystitservices.com>

Signed-off-by: Galen Charlton <gmc@esilibrary.com>