bpo-35770: IDLE macosx deletes Options => Configure IDLE. (GH-11614)

It previously deleted Window => Zoom Height by mistake.
(Zoom Height is now on the Options menu).  On Mac, the settings
dialog is accessed via Preferences on the IDLE menu.
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 222f187..61457e9 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,11 @@
 ======================================
 
 
+bpo-35770: IDLE macosx deletes Options => Configure IDLE.
+It previously deleted Window => Zoom Height by mistake.
+(Zoom Height is now on the Options menu).  On Mac, the settings
+dialog is accessed via Preferences on the IDLE menu.
+
 bpo-35769: Change new file name from 'Untitled' to 'untitled'.
 
 bpo-35660: Fix imports in window module.
diff --git a/Lib/idlelib/macosx.py b/Lib/idlelib/macosx.py
index 9be4ed2..d6a1b37 100644
--- a/Lib/idlelib/macosx.py
+++ b/Lib/idlelib/macosx.py
@@ -178,7 +178,7 @@
     del mainmenu.menudefs[-1][1][0:2]
     # Remove the 'Configure Idle' entry from the options menu, it is in the
     # application menu as 'Preferences'
-    del mainmenu.menudefs[-2][1][0]
+    del mainmenu.menudefs[-3][1][0:1]
     menubar = Menu(root)
     root.configure(menu=menubar)
     menudict = {}