Fix camera capture reliability and rewrite tracking for available mediapipe/hardware

source/main.py

@@ -7,7 +7,6 @@ from pathlib import Path
 from Tbd.helper import default_profile, CameraObject
 from UI.SetupPageWidget import SetupPage
 from UI.HomePageWidget import HomeWindow
-from UI.GameWindow import GameWindow
 from UI.UILogger import UILogger
 from Tbd.TrackingController import TrackingController
 
@@ -122,6 +121,7 @@ class MainWindow(QMainWindow):
         self.btn_exit.clicked.connect(self.close)
 
         self.game_window = None
+        self.tracking = None
 
     # --------------------
     def on_cameraList_changed(self):