math: support max of three values additional to min and use it everywhere

src/lib/mathlib/math/Limits.hpp

@@ -68,6 +68,12 @@ constexpr _Tp max(_Tp a, _Tp b)
 	return (a > b) ? a : b;
 }
 
+template<typename _Tp>
+constexpr _Tp max(_Tp a, _Tp b, _Tp c)
+{
+	return max(max(a, b), c);
+}
+
 template<typename _Tp>
 constexpr _Tp constrain(_Tp val, _Tp min_val, _Tp max_val)
 {