- refactoring of MatrixIntraPrediction.h/.cpp (merged classes MatrixIntraPrediction and PredictorMIP, removed namespace Mip)
- removed unused variable posBias in function computeReducedPred
- fixed list size in function reduceHadCandList

This reverts commit 9503ca9c

- fixed build error

- Fix for the case that uninitialized or invalid best cost values are referred during search candidate selection

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

It cleans up old ISP code that is no longer used anymore. The code was used to allow only one ISP split depending on the block size. However, this functionality is not needed anymore after the adoption of JVET-N0308 during the Geneva Meeting in March, which limited the usage of ISP to CUs with a maximum size of 64x64 samples. This clean-up eliminates various unnecessary checks and improves the readability of the code.

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

See merge request !577

- The indexing of cost array was corrected by following shuffling pattern of full-RD candidate list employed by MIP.
- ~0.1% coding gain inc. along with ~4% encoding time dec. in AI

This reverts merge request !532