fix compilation errors by code merging and harmonize with JVET_O0119_BASE_PALETTE_444, JVET_O0502_ISP_CLEANUP, JVET_O0472_LFNST_SIGNALLING_LAST_SCAN_POS, JVET_O0545_MAX_TB_SIGNALLING

This reverts commit 9503ca9c

1. indentation
2. function naming
3. Class declaration positions

initial commit of JVET_O0119_BASE_PALETTE_444: palette in HEVC and palette mode coding in JVET-N0258

JVET_O0078_SINGLE_HMVPLUT: Single HMVP table for all CUs inside the shared merge list region for IBC

JVET-N0805: APS for LMCS (using different APS types)

See merge request !577