Comment 4 for bug 1812241

I rebased Rogan's commit, and re-did mine: user/sandbergja/lp1812241_nosubfieldz-2

Some testing notes:

1. Create two records with located URIs (e.g. with 856 40 $9 CONS).
2. Give one of the records a note in 856$z
3. In the Library Settings Editor, set a value for "Default text to appear for 856 links if none is present" for your OPAC's org unit or higher.
4. Confirm that the record with the 856$z still uses the 856$z text as the link note text in the record page.
5. Confirm that the record with the 856$z still uses the 856$z text as the link note text in the search results ("show more details" needs to be on for it to display).
6. Confirm that the record without an 856$z uses the text you entered in the Library Settings Editor as the note, in both the record view and the search results page (again, with "Show More Details" turned on).