Remove TransformShift in TS mode.

Detail
- Align SW with specification.
- Boundary strength for BDPCM is independently derived for each component.

Add a description of ChromaTS into the software manual.

JVET-P0983/P0391: remove sps maximum sbt size flag: add configurable parameter to use 64 size SBT in encoder RDO

  - Code cleanup.

  - Fix multiplication overflow in scaled MV position.

  - Disable clipping of unscaled RPR motion vectors.

  - Disable sub-PU grouping optimization with RPR.

  - Interaction between RPR and BDOF.

  - Incorrect calculation of refHeight.

  - Incorrect clipping at picture border and insufficient picture buffer margin.

Changing variable names to not start with capital letter. Also replaced leading s_ with m_ for private, static member variables.

  - Unsafe use of reference picture PPS pointers.

I have confirmed that this modification can be consistent with the specification and there is no problem with the coding results.