Deoldify Vapoursynth filter

[Dan64]

In the test sample provided there are the 6 cases that Hybrid should be able to manage.
The proposed changes were the ones with minor changes both on your side and my side.

I will think about another way to manage these 6 cases.

The new GUI is Ok, the B&M mode "CLAHE + Simple(luma)" should be changed in "ScaleAbs + Simple(RGB)", I changed this in RC2.

Thanks,
Dan