Avoid out of bounds access in deriveOutputLayerSet

See merge request jvet/VVCSoftware_VTM!1234

JVET-Q0775: Enable signalling of picture header in slice header

See merge request jvet/VVCSoftware_VTM!1255

JVET_Q0297: Merge estimation region

See merge request jvet/VVCSoftware_VTM!1270

JVET-Q0501: Palette predictor initialization from above CTU row in WPP

See merge request !1271

JVET-Q0820: ACT bug fixes and reversible ACT transform

See merge request jvet/VVCSoftware_VTM!1265

Fix uninitialized memory access in PPS::initSubPic() after !1236

See merge request jvet/VVCSoftware_VTM!1269

Add inferrence of subpic parameters when sps_subpic_present_flag == 0

Force the decoding of all layers when TargetOutputLayerSets is not set, or when only one layer is present in the VPS.

JVET-Q0795: Cross-component ALF

See merge request jvet/VVCSoftware_VTM!1258

BDPCM Chroma syntax is disallowed to signal when ACT is enabled for CU.
Decision(BF/SW): Adopt JVET-Q0353 method 1.

JVET-Q0695: Enabling the RD checking of chroma transform-skip mode for JCCR at encoder

See merge request jvet/VVCSoftware_VTM!1260

JVET-Q0516/Q0685: disable MTS when there is only DC coefficient

See merge request jvet/VVCSoftware_VTM!1256

Merge branch 'master' of https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM into JVET_Q0155_COLOUR_ID

fix ticket #820: RPR: sampleRateConv() function takes wrong input bitdepth

See merge request jvet/VVCSoftware_VTM!1241

JVET-Q0147: Conditional signaling of sps_joint_cbcr_enabled_flag based on ChromaArrayType.

See merge request jvet/VVCSoftware_VTM!1262

fix for MR !1236

See merge request jvet/VVCSoftware_VTM!1257

- compile fix for macOS
- initialize rectangular slice map before using it for subpictures