With a recent refactoring, I accidentally broke camera-orbit and camera-target. This happened because the order of operations slightly changed, and so it became:

1. Load the model
2. Fire the observable
3. Element sets the camera-orbit and camera-target
4. Set the default animation, which implicitly resets the camera (therefore discarding the camera-orbit and camera-target)

This PR both fixes this problem, and introduces some new Playwright automated tests. The initial set of tests validate these recent regressions, but I will continue to flesh out the tests.

@RaananW - what else is needed to have these tests run in the CI?