bpo-33855: Still more edits and minimal tests for IDLE  (GH-7784)


Part 3 of 3, continuing PR GH-7689. This covers 14 idlelib modules and their tests,
rpc to zoomheight except for run (already done) and tooltip (being done separately).
(cherry picked from commit 4d92158f4c3917fc4fbfebff15224e74782abf79)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/windows.py b/Lib/idlelib/windows.py
index a3f858a..b1e5038 100644
--- a/Lib/idlelib/windows.py
+++ b/Lib/idlelib/windows.py
@@ -90,3 +90,8 @@
             # This can happen when the window menu was torn off.
             # Simply ignore it.
             pass
+
+
+if __name__ == "__main__":
+    from unittest import main
+    main('idlelib.idle_test.test_windows', verbosity=2)