Handle leak hosting WPF in MFC on multitouch Monitor

[SamBent]

Problem description:
Touch-related resources (including OS handles) can leak when closing a window. The leak occurs when a touch device is active, for windows whose HwndSource is created directly by the app.
[Port of servicing fix for .NET 4.7-4.8.]

[SamBent]

Fix ported to 3.1.19, 5.0.10, 6.0.