Fix colors in gamma space being treated as if they were in linear space

[PunkPun]

Fixes #20415 (comment)

PlayerColorRemap expected colors in linear space yet we provided them in gamma. We fix this by instead expecting gamma space colors and then converting them into linear space ourselves.

Fix proposed by @pchote

[pchote]

On second thought, it would be better to pass the original color into PlayerColorRemap and do the linearisation internally.

[PunkPun]

Now passing color directly

[penev92]

OK, from what I read this does make sense.
The input Hue and Saturation in PlayerColorRemap, now input color, is assumingly in gamma color space. GetRemappedColor() already clearly states that the remapping is done in linear color space and converts the original color to linear before it starts, so makes sense that the Hue and Saturation (ignoring Value) of the remapping (input) color would need to be in the same space.
The conversion from RGB to HSV of the input color remains the same, but now the RGB is in linear space and so are the resulting Hue and Saturation (ignoring the Value).

That explanation was for me to make sure I understood correctly, for someone to confirm or deny if I did understand correctly and possibly to help others that like me did not have previous knowledge of the matter understand what's going on.

[PunkPun]

Renamed the commit / added a description

[penev92]

👍

[penev92]

Changelog

And commit on prep.