Fix weird __wrapped__ missing attribute

Author: jeylau

src/napari_deeplabcut/_widgets.py

@@ -380,7 +380,7 @@ def settings(self):
         return QSettings()
 
     def start_tutorial(self):
-        Tutorial(self.viewer.window._qt_window.__wrapped__).show()
+        Tutorial(self.viewer.window._qt_window.current()).show()
 
     def _load_config(self):
         config = QFileDialog.getOpenFileName(