bpo-23544: Disable IDLE Stack Viewer when running user code (GH-17163)

Starting stack viewer when user code is running, including when Debugger is active, hangs or crashes IDLE.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/codecontext.py b/Lib/idlelib/codecontext.py
index eb19773..f2f44f5 100644
--- a/Lib/idlelib/codecontext.py
+++ b/Lib/idlelib/codecontext.py
@@ -142,7 +142,7 @@ def toggle_code_context_event(self, event=None):
             self.text.after_cancel(self.t1)
             self._reset()
             menu_status = 'Show'
-        self.editwin.update_menu_label(menu='options', index='* Code Context',
+        self.editwin.update_menu_label(menu='options', index='*ode*ontext',
                                        label=f'{menu_status} Code Context')
         return "break"