various changes

- added checkbox for ambient field compensation
- moved part of axis setup to axis.__init__

main.py

@@ -11,6 +11,9 @@ try:  # start normal operations
     print("\nOpening User Interface...")
 
     g.app = HelmholtzGUI()
+    func.ui_print("Program Initialized")
+    func.ui_print("Starting setup...")
+    func.setup_axes()  # initiate communication, set handles
     g.app.mainloop()
     g.app = None  # reset to None so nothing tries to print in the UI output