Fix call to initSEIScalableNesting

See merge request jvet/VVCSoftware_VTM!2027

Add decoded picture hash SEI writing for subpictures in subpic merger app

See merge request jvet/VVCSoftware_VTM!2024

Fix #1468: bugfix parcat: remove duplicate prefix sei for IDR

See merge request jvet/VVCSoftware_VTM!2023

Fix #1467: Replace std::sort() with std::stable_sort() to avoid cross-platform performance mismatch

See merge request jvet/VVCSoftware_VTM!2022

Fix #1464: Non-conforming values of sn_subpic_id_len_minus1

See merge request jvet/VVCSoftware_VTM!2021

Fix #1465: skip mixed nalu leading pictures when beginning a stream

See merge request jvet/VVCSoftware_VTM!2019

Fix #1466: fix check on SPS virtual boundaries constraint.

See merge request jvet/VVCSoftware_VTM!2020

Fix #1459: Modify ALF AVX2 code from JVET-U0103

See merge request jvet/VVCSoftware_VTM!2017

Enable processing of low bit depth content with JVET_U0103_HIGH_BIT_DEPTH_SIMD

See merge request jvet/VVCSoftware_VTM!2016

Fix for ticket #1458: printout wPSNR for hbd ctc

See merge request jvet/VVCSoftware_VTM!2012

Fix: #1460: init MTS coeff Constraint in MTS loop during Intra Search

See merge request jvet/VVCSoftware_VTM!2013

JVET-U2018: Update sequence configuration files

See merge request jvet/VVCSoftware_VTM!2015

Fix compilation when JVET_R0351_HIGH_BIT_DEPTH_ENABLED is set to 1

See merge request jvet/VVCSoftware_VTM!2014

Cleanup: fix return type of PPS::getMixedNaluTypesInPicFlag

See merge request jvet/VVCSoftware_VTM!2011

Return bool since variable is a boolean. Also fix use of returned
values.

Fix #1457: rplIdx variable for list 1 is not always set in parseSliceHeader()

See merge request jvet/VVCSoftware_VTM!2010

Fix #1456: Incorrect DPB flush when mixed NALU types is enabled

See merge request jvet/VVCSoftware_VTM!2009

Fix #1453: use 64-bit variables for RPR to prevent overflow

See merge request jvet/VVCSoftware_VTM!2008

Overflow may occur in corner cases in large pictures.
Added const modifiers where appropriate.
Defined additional variables to hold intermediate values to avoid
code duplication.
Rename variables to more closely match VVC specification.