* Move moving average and cumulative sum to private preview * update docs * move formatString to private preview * rebuild docs * undo changes that don't belong to this commit * undo cumulative/window featureflag * fix case
* Move moving average and cumulative sum to private preview * update docs * move formatString to private preview * rebuild docs * undo changes that don't belong to this commit * undo cumulative/window featureflag * fix case