Fixed blending algorithm for transition leds

[landler]

The blending algorithm for the transition leds of divided lights had a math error, causing it to always return a brightness exactly half of what it should be. This caused the transitions between two colors to be too dim, easiest seen on very low brightnesses (e.g. Nightlight of the default Hue modes).

Before:

After:

(It looks a bit different due to different exposure, but point being that it's uniform now)

[mariusmotea]

Thanks for fixing this.

[Burn-In]

@landler Good job. Thanks. This one bothered me for a long time.

But, you should also remove it in RgbColor blendingEntert(). This function always run for me.

_