What is recommended way to handle system Back button click with new AppWindow APIs?
Let's say, we have main window and secondary AppWindow opened side-by-side on a tablet. User pressed hardware or software Back button and SystemNavigationManager fires BackRequested event. But secondary AppWindow shares CoreWindow with main window and it is not clear which of them should handle this event. Unlike old Window, AppWindow does not have events to track whether it is active or not.