[PATCH v4 0/2] MR6569: Draft: winex11: Keep a list of pending window config requests.

[Rémi Bernon (＠rbernon)]

Instead of a single configure serial, which is simply not enough to
mitigate event feedback loops.

This should (hopefully) address the recent d3d8:device / d3d9:device
test failures on the Gitlab CI, without having to add more `flush_events`
calls to the tests.

I believe it should also provide a more general fix to this race condition
than the configure_serial mechanism.

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  v4: winex11: Also discard near-matching configs with similar sizes.
      winex11: Keep a list of pending window config requests.

https://gitlab.winehq.org/wine/wine/-/merge_requests/6569