Prefer "backend-fetch" when possible, and other fix that reduces the number of images xIFr can't open directly from a website.

Very minor fixes and details

This release is a very minor update for normal endusers.
But of course still includes all other improvements to "deep search" made in previous recent releases.

(a bit more) improvements of "deep search"

More improvements to Deep Search

Improvements to Deep Search

Support "Digital Source Type" and other very minor updates.

bugfix release

Some minor improvements

Minor updates