[PATCH v2 0/4] MR2334: user32: Add some ActivateKeyboardLayout tests and send WM_INPUTLANGCHANGE.

[Rémi Bernon]

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  v2: win32u: Send WM_INPUTLANGCHANGE when activating new layout.
      win32u: Move window query functions around.
      user32/tests: Add a WM_INPUTLANGCHANGE message test.
      user32/tests: Skip tests if layout failed to activate.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/2334