[PATCH 0/5] MR6809: winex11: Misc window config code tweaks.

[Rémi Bernon (＠rbernon)]

Progressing towards https://gitlab.winehq.org/wine/wine/-/merge_requests/6569, and instead of dropping the old fields (https://gitlab.winehq.org/wine/wine/-/merge_requests/6731) now, which could be considered riskier.

- Avoid requesting unnecessary window config / state changes,
- avoid triggering spurious window restore by updating _NET_WM_STATE on iconic windows,
- simplify some code flow in preparation for delayed Win32 window state updates.