Fix MouseButton::Other value on Windows

This was a mistake in the transition to windows-sys: rust-windowing#2057

We used winapi's GET_XBUTTON_WPARAM before which is using HIWORD instead of LOWORD: https://docs.rs/winapi/0.3.9/src/winapi/um/winuser.rs.html#1297-1299

CHANGELOG.md

@@ -8,6 +8,7 @@ And please only add new entries to the top of this list, right below the `# Unre
 
 # Unreleased
 
+- On Windows, fix the value in `MouseButton::Other`.
 - On Windows, fix icons specified on `WindowBuilder` not taking effect for windows created after the first one.
 - On Windows and macOS, add `Window::title` to query the current window title.
 - On Windows, fix focusing menubar when pressing `Alt`.

src/platform_impl/windows/mod.rs

@@ -120,7 +120,7 @@ impl From<u64> for WindowId {
 
 #[inline(always)]
 const fn get_xbutton_wparam(x: u32) -> u16 {
-    loword(x)
+    hiword(x)
 }
 
 #[inline(always)]