Replace remaining arrays of views with 4D views in ElasticDisplacement
To keep things "simple" I never switch _uOld and the output of SolutionCallback from arrays of 3D views to 4D views. The code will be cleaner if we switch those over.
To keep things "simple" I never switch _uOld and the output of SolutionCallback from arrays of 3D views to 4D views. The code will be cleaner if we switch those over.