Wrong Hex value displayed after entering Hex code (HSB color space)

[chrs1885]

When entering specific Hex values (e.g. #ABCDEF) into the HSB color picker, it will set a different value. The problem is that SheetyColors will fall back to the nearest color that can be represented with integer values only.

If a user explicitly enters a color with a Hex value, we need to support float values as well.