Disable config file for user study

So each task simulates using the GUI after a reboot.

src/pydiode/gui/common.py

@@ -3,6 +3,9 @@
 # Check subprocesses every SLEEP milliseconds
 SLEEP = 250
 
+# Certain features will be disabled for the user study
+USER_STUDY = True
+
 
 def get_process_errors(name_popen):
     """

src/pydiode/gui/main.py

@@ -3,6 +3,7 @@
 import sys
 from tkinter import BooleanVar, IntVar, Listbox, StringVar, Tk, ttk
 
+from pydiode.gui.common import USER_STUDY
 from pydiode.gui.receive import (
     receive_or_cancel,
     receive_test,
@@ -248,8 +249,10 @@ def gui_main():
         "receive_repeatedly": receive_repeatedly.get(),
         "saved_window_should_show": SavedWindow.should_show.get(),
     }
-    with open(CONFIG, "w") as configfile:
-        config.write(configfile)
+    # Disabled for the user study, to simulate using the GUI after a reboot
+    if not USER_STUDY:
+        with open(CONFIG, "w") as configfile:
+            config.write(configfile)
 
 
 def main():