bpo-33906: Rename idlelib.windows as window (#7833)
Match Window on the main menu and remove last plural module name.
Change imports, test, and attribute references to match new name.
diff --git a/Lib/idlelib/browser.py b/Lib/idlelib/browser.py
index 447dafc..234883f 100644
--- a/Lib/idlelib/browser.py
+++ b/Lib/idlelib/browser.py
@@ -16,7 +16,7 @@
from idlelib.config import idleConf
from idlelib import pyshell
from idlelib.tree import TreeNode, TreeItem, ScrolledCanvas
-from idlelib.windows import ListedToplevel
+from idlelib.window import ListedToplevel
file_open = None # Method...Item and Class...Item use this.