Added close behaviour option for specific window (#3754)

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/desktop/src/lib.rs

@@ -47,7 +47,7 @@ pub mod trayicon;
 
 // Public exports
 pub use assets::AssetRequest;
-pub use config::{Config, WindowCloseBehaviour};
+pub use config::{Config, DefaultWindowCloseBehaviour, WindowCloseBehaviour};
 pub use desktop_context::{
     window, DesktopContext, DesktopService, PendingDesktopContext, WeakDesktopContext,
 };