Fix up windows bar on top

src/Mobile/Services/EssentialsExtensions.cs

@@ -65,6 +65,10 @@ public static class EssentialsExtensions
                 .OnLaunched((application, args) =>
                 {
                     Platform.OnLaunched(args);
+                })
+                .OnNativeMessage((app, args) =>
+                {
+                    app.ExtendsContentIntoTitleBar = false;
                 }));
 #endif
         });