De-'colour'ize stdlib except for idlelib.configDialog.
Tweak docstrigs and comments in affected functions in idlelib.configHandler.
diff --git a/Lib/idlelib/EditorWindow.py b/Lib/idlelib/EditorWindow.py
index cc33baf..d06e2da 100644
--- a/Lib/idlelib/EditorWindow.py
+++ b/Lib/idlelib/EditorWindow.py
@@ -781,7 +781,7 @@
         self.color = None
 
     def ResetColorizer(self):
-        "Update the colour theme"
+        "Update the color theme"
         # Called from self.filename_change_hook and from configDialog.py
         self._rmcolorizer()
         self._addcolorizer()