Bevy winit::Window hide/show not working

Toggling the visible on Ubuntu 22.04 with Unity and Wayland does not work as expected:

* In Bevy 0.16.1, toggling visible true/false works, but the window level property is lost. If `window_level` is set to `WindowLevel::AlwaysOnTop`
* In Bevy 0.17.3, toggling visible true/false does not work at all.
* In Bevy revision `16409b8`, the window is not shown at all.

See the attached code example to reproduce the issue.

My Rust version: `cargo 1.91.1 (ea2d97820 2025-10-10)`

[bevy_winit_window_bug.zip](https://github.com/user-attachments/files/24130364/bevy_winit_window_bug.zip)

Start by unpacking the attached bevy_winit_window_bug.zip and reproducing the behavior on Ubuntu 22.04 with Unity and Wayland. Compare visibility toggling in Bevy 0.16.1, 0.17.3, and revision 16409b8, including the AlwaysOnTop window level. Done means hide/show works and the window level is preserved.

Written by the indexing model from the issue text.