Codechange: Define sequential operators for ZoomLevel.

src/core/math_func.hpp

@@ -271,6 +271,12 @@ constexpr bool IsInsideMM(const size_t x, const size_t min, const size_t max) no
 
 constexpr bool IsInsideMM(const ConvertibleThroughBase auto x, const size_t min, const size_t max) noexcept { return IsInsideMM(x.base(), min, max); }
 
+template <typename enum_type, std::enable_if_t<std::is_enum_v<enum_type>, bool> = true>
+constexpr bool IsInsideMM(enum_type x, enum_type min, enum_type max) noexcept
+{
+	return IsInsideMM(to_underlying(x), to_underlying(min), to_underlying(max));
+}
+
 /**
  * Converts a "fract" value 0..255 to "percent" value 0..100
  * @param i value to convert, range 0..255