Support HDR screens on macOS/iOS

The previous work was reverted for 3.0, because of the issues mentionned in #17383 (closed) and also partly in #17692 (closed).

And improved with #17763 (closed) but not enough was done

So creating a new ticket for this for P3 displays

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information