JVET-S0160 aspect 1 and aspect 9: inference of pps_loop_filter_across_tiles_enabled_flag and constraint on ph_poc_msb_cycle_present_flag

The variable invAngle in the VVC specification is signed, whereas
the variable in the software is unsigned.

Silence warnings for potentially invalid array indexes by adding explicit checks.

JVET-S0049 aspect 4: Constrain the value of pps_alf_info_in_ph_flag to be equal to 0 when the PH is in the SH

Detail
- Group the dual tree related syntax elements together in the SPS (JVET-S0132 aspect 1)
- Rearrange the partition constraint related syntax elements in the SPS (JVET-S0132 aspect 2)
- Rearrange the syntax elements related to inter slices in the PPS (JVET-S0132 aspect 3)

32-bit accumulation is required for ALF filter to avoid overflow,
even when coding 8- and 10-bit video.
Only non-SIMD code is affected (which is generally not used)