Implement Background based on Delta for the Timer

[CryZe]

I completely forgot that this is an actual feature. I noticed this when I tried to import some layout file that didn't parse correctly.

LiveSplit/LiveSplit.Timer@fbacda1

[Hurricane996]

ok im messing with this. I'm trying to figure out how to represent delta gradient as a setting. It seems like the best option is to add another variant of Value, but that's a breaking change. Please advise

[CryZe]

Breaking changes are totally fine at this point 👍

[Hurricane996]

I noticed something interesting while I was fixing the alpha; vanilla livesplit doesn't consider the timer's background color at all. The gradient just goes from very transparent, devalued, desaturated version of the delta color to a more natrual version. Is that intended behavior?