axiom view per artefact

Minor thing – it might be useful if when you select thumbnail view that other non-thumbnail artefacts remain available in column view – almost like column view is the default and then thumbnail view can be set as the default for media. I raise this because I've seen a number of instances where (mostly) newer viewers are in thumbnail view then filter on bookmarks and wonder why nothing is displayed. Seeing the artefact pane populate with other artefacts that don't have a thumbnail view would be really helpful!