[PATCH v6 0/6] MR9830: Draft: fix toplevel icon protocol for Wayland

[Alex Schwartz (＠alexschwartz01)]

Fixes https://bugs.winehq.org/show_bug.cgi?id=59149

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  v6: remove IsTopLevel completely
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9830