bpo-4630: Add cursor no-blink option for IDLE (GH-16960)
This immediately toggles shell, editor, and output windows, but does not affect other input widgets.
diff --git a/Lib/idlelib/config-main.def b/Lib/idlelib/config-main.def
index b2be625..28ae941 100644
--- a/Lib/idlelib/config-main.def
+++ b/Lib/idlelib/config-main.def
@@ -59,6 +59,7 @@
[EditorWindow]
width= 80
height= 40
+cursor-blink= 1
font= TkFixedFont
# For TkFixedFont, the actual size and boldness are obtained from tk
# and override 10 and 0. See idlelib.config.IdleConf.GetFont