renamed the getWideAngleIntraMode function as well

1) The getWideAngle function has been renamed to getModifiedWideAngle.
2) A comment has been added inside this function to explicitly mark the behavior.

Fix to signal bitrate and CPB size in HRD parameters
Fix to make sure the PT SEI is generated for every picture

Retrained on CTC bitstreams generated with VTM 9.0rc1

store sub-picture numbers, sizes, and locations with a picture, so that they can be fetched directly from redPic

Includes:
- added flag
- minor updates for variable names
- update for trace strings according to JVET-R2001-vA

JVET-R0162 proposal1: change the signaling of wraparound offset to picture width minus wraparound offset

- fixes other style issues as well