[client] Update fyne and add exit menu retry (#5187)

* Update fyne and add exit menu retry

- Fix an extra arrow on macos by updating fyne/systray

* use systray.TrayOpenedCh instead of loop and retry

client/ui/network.go

@@ -341,7 +341,6 @@ func (s *serviceClient) updateExitNodes() {
 		log.Errorf("get client: %v", err)
 		return
 	}
-
 	exitNodes, err := s.getExitNodes(conn)
 	if err != nil {
 		log.Errorf("get exit nodes: %v", err)