pdb: add a PDB procedure for shadows-highlights
This adds the shadows-highlights operation to the PDB.
I put it under gimp-colors because it is in the colors menu. I'm not sure what the rule is about what is considered compat.
This adds the shadows-highlights operation to the PDB.
I put it under gimp-colors because it is in the colors menu. I'm not sure what the rule is about what is considered compat.