Improve Back and Forward mouse button docs and comments

src/event.rs

@@ -1202,10 +1202,8 @@ pub enum ElementState {
 ///
 /// ## Platform-specific
 ///
-/// **macOS:** does not offically define `Back` and `Forward`, but supports 29 generic mouse buttons from 3..=31.
-/// `3` and `4` is commonly used for `Back` and `Forward` respectivly by driver vendor and applications such as browsers,
-/// this follows this convention. Not guaranteed to work with all hardware and configurations.
-/// **orbital:** `Back` and `Forward` are unsupported due to orbital not supporting them.
+/// **macOS:** `Back` and `Forward` might not work with all hardware.
+/// **Orbital:** `Back` and `Forward` are unsupported due to orbital not supporting them.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseButton {

src/platform_impl/macos/view.rs

@@ -1024,6 +1024,8 @@ fn mouse_button(event: &NSEvent) -> MouseButton {
     // The buttonNumber property only makes sense for the mouse events:
     // NSLeftMouse.../NSRightMouse.../NSOtherMouse...
     // For the other events, it's always set to 0.
+    // MacOS only defines the left, right and middle buttons, 3..=31 are left as generic buttons,
+    // but 3 and 4 are very commonly used as Back and Forward by hardware vendors and applications.
     match event.buttonNumber() {
         0 => MouseButton::Left,
         1 => MouseButton::Right,