Merge branch 'master' into feature-cleanup

src/main.rs

@@ -355,7 +355,7 @@ async fn main() {
         .title(title_string)
         .window_size((400.0, 400.0));
     let app_launcher = AppLauncher::with_window(main_window);
-    let external_handler = app_launcher.get_external_handle();
+    let _external_handler = app_launcher.get_external_handle();
     app_launcher.launch(1).unwrap();
     // AppLauncher::with_window(main_window).launch(1).unwrap();