Merge pull request #17904 from josephsl/winUIGoodUIAWindowClassNames
Closes #17771
Partly closes #17407
Summary of the issue:
Mouse and touch interaction does not work in WinUI 3 apps such as Microsoft Copilot and parts of Windows 11 File Explorer interface.
Description of user facing changes
Mouse and touch interaction can be used in WinUI 3 apps.
Description of development approach
Added Microsoft.UI.Content.DesktopChildSiteBridge to good UIA window class names. An alternative approach is done through Mouse Enhancement add-on where NVDA will confess that WinUI 3 app elements are good UIA windows when the mentioned top-level pane window class is present.