Use the browser state when returning from a asset view.
Use the browser state when returning from a asset view.

As a part of this do some cleanup of how we trigger the view-mode for returning
users - make sure to strip the "map" part off of the url to allow users returning
to the list-view mode to end up in it.

KB-471

CopenhagenCityArchives/kbh-billeder,CopenhagenCityArchives/kbh-billeder,CopenhagenCityArchives/kbh-billeder