[ SF 710733 - Martin v. Loewis] Improving source encoding dialog

M IOBinding.py
M config-main.def
M configDialog.py
diff --git a/Lib/idlelib/config-main.def b/Lib/idlelib/config-main.def
index 9d520c1..a6388d1 100644
--- a/Lib/idlelib/config-main.def
+++ b/Lib/idlelib/config-main.def
@@ -49,6 +49,7 @@
 font= courier
 font-size= 12
 font-bold= 0
+encoding=none
 
 [Indent]
 use-spaces= 1