Various improvements for TitleColorMatch

[buthed010203]

• Black logos will now have their color inverted so that they're readable on the black gradient
• Cleaned up some code

This should probably have the font_color set to auto by default since that's the main appeal of using this over GradientLogoTitleCard.

[buthed010203]

I need to nail down a better minimum luminosity still (perhaps it would be a good idea to add a color difference calculation too?). Also some of the code returns on the first loop of the luminosity check every time even if its too low, I will fix that.