run_uac with wchar, refactor elevate_or_run_as_system

Signed-off-by: 21pages <pages21@163.com>

src/tray.rs

@@ -27,7 +27,7 @@ pub fn start_tray(options: Arc<Mutex<HashMap<String, String>>>) {
         .build()
         .unwrap();
     let old_state = Arc::new(Mutex::new(0));
-    let _ = crate::ui_interface::SENDER.lock().unwrap();
+    let _sender = crate::ui_interface::SENDER.lock().unwrap();
     event_loop.run(move |event, _, control_flow| {
         if options.lock().unwrap().get("ipc-closed").is_some() {
             *control_flow = ControlFlow::Exit;