Ensure that transformation data in navigation table is stored aligned

This changeset alignes the rotation and translation data stored in the navigation table, so it can be loaded more efficiently.

TestEm3 (before): Mean: 1.76788 Uncertainty: 0.00101691

TestEm3 (after): Mean: 1.75159 Uncertainty: 0.00132503

The byte-wise Transformation3D::Set call is removed as well, since it is no longer needed.