Unified search: provide proper thumbnail url

[tobiasKaminsky]

http://localhost/nc/ocs/v2.php/search/providers/notes/search

does not provide thumbnailUrl, but it could show a correct preview of the note.

[aardquark]

I have noticed recently that while the Notes search feature still works as far a showing correct preview of what is found, I cannot click on the preview to get to the actual note. This may be restating this same problem, but in any event, if actual url links are provided, it would be one way of solving the problem. This problem occurs using Safari browser on macOS Ventura. Using Chrome browser on same system the linking process to the found notes items works.