Bug 37337: Pass the save $op when biblio_exists

Bug 37337: Pass the save $op when biblio_exists

To test:
1. Go to suggestions in the staff interface and enter a new suggestion.
2. Enter a title that matches something already in the catalog. In k-t-d I used "Lanark".
3. Submit the suggestion.
4. Get a blank page.
5. APPLY PATCH and restart_all
6. Now after step 3 you should get a page that shows the 'Click on "Confirm your suggestion" to ignore this message." warning, the form, and a Confirm your suggestion button.

Signed-off-by: Jake Deery <jake.deery@ptfs-europe.com>
Signed-off-by: Jan Kissig <jkissig@th-wildau.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 8e7208d7104bef61f45f10e2a3324e445d177094)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 7ae41cda1d991b50c79aa93d669c1d1b7933f7ac)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>