fixed functionality of utils.lerp()

((a - b) + b)*t = a*t
switched to
(1-t)*b + a*t

visualization of change:
https://www.desmos.com/calculator/91ge9obdoi

modules/utils.lua

@@ -74,7 +74,7 @@ end
 -- @param progress (0-1)
 -- @return number
 function utils.lerp(low, high, progress)
-	return ((high - low) + low) * progress
+	return (1 - progress) * low + progress * high
 end
 
 --- Exponential decay