Bug 7202 - z39.50 search on bib edit not working

Bug 7202 - z39.50 search on bib edit not working

The pop-up menu's "Import" link did not correctly pick
up the existing record's biblionumber, if present.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
To test:
1) Searched for a record in your catalog
2) Edit > Edit record
3) Start Z39.50 search
4) Pick a new record with different title for import
- using the import link at the end of the table line
- using the pop up menu's import link
5) Save and check if a duplicate was created

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit 7fd5098b98007e3a25e6694a5b31ef0828ce4997)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>