The details view is now implemented with css grid, in a full-window
no-scroll layout (except for small screens, where the design is still
sequential and scroll is used)
This incudes some cleanup of the markup and corresponding changes in
the admin script.
Use local storage to remember the last position set for a picture, and
use that as a starting point when positioning an image that does not
allreay have any known position.
Sometimes the markers would not view, that was because the trick to
find the correct url for the marker images didn't work when the css
might load after the js. So just load the css before the js instead.
