nw2 implementation cause windows to become floating ones on tiling compositors

[Porkepix]

Issue Type

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• Bug Report

• Feature Request

• Successfully reproduced against the latest version of NW.js?

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Current/Missing Behavior

By default when using the nw2 implementation, on a tiling compositor such as Hyprland, the window appears in a floating mode not tied to anything, leaving us with something not working as intended with tiles, or set it as fullscreen but then taking every place, not working well with tiles either.

The issue isn't here with nw1 (using --disable-features=nw2).
The issue also isn't here when running directly on Wayland with --ozone-platform=wayland instead of the default XWayland, but then other issues appears such as #8185

Expected/Proposed Behavior

The window should behave as it did with nw1 and correctly fit as a tile.

Additional Info

See streamlink/streamlink-twitch-gui#1012 for the reported issue downstream

• Operating System: ArchLinux
• NW.js Version: At least every version since 0.78; probably here since the beginning of nw2.
• Repro Link: I've no idea what's this.
• Code snippet: None, probably any nw.js application in a tiling wm environment.
• Crash report: N/A