perf(Camera): Save a transposed copy of externally provided view matrix
perf(Camera): Save a transposed copy of externally provided view matrix

This change ensures that there is not much performance overhead of
transposing the matrix each frame.

Also, refactored code to reduce publicAPI footprint.

Kitware/vtk-js,Kitware/vtk-js,Kitware/vtk-js,Kitware/vtk-js