This also updates the attribution system so that entire folders can be covered
by a single entry. It assumes every file has the same source.

Also makes the scale input behave like the rest - change, not input

Otherwise, you could load a giant scene, close the browser, and be stuck with
it forever!

This reverts commit 4c58eb9b94.

This reverts commit 7182f0479e.

Still very rough around the edges...

The defualt view was being referenced.