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.

Lib/idlelib/NEWS.txt

@@ -3,6 +3,11 @@ Released on 2019-10-20?
 ======================================
 
 
+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.

Lib/idlelib/macosx.py

@@ -178,7 +178,7 @@ def overrideRootMenu(root, flist):
     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 = {}

Misc/NEWS.d/next/IDLE/2019-01-18-13-04-30.bpo-35770.2LxJGu.rst

+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.