add tracker selection dropdown menu and impl functionality

main.py

@@ -1,6 +1,5 @@
 from core.ui.gui import MainWindow
 from core.ui.gui import state_debug
-from core.ui.gui import choose_tracker
 from PySide6 import QtWidgets
 import qdarktheme
 import darkdetect
@@ -10,7 +9,6 @@ debug = True
 
 def run_gui():
     state_debug(debug)
-    choose_tracker()
     app = QtWidgets.QApplication([])
     if darkdetect.isDark:
         app.setStyleSheet(qdarktheme.load_stylesheet("dark"))