This fixes the panic that happened in debug builds in Wayland when
focusing/defocusing window in the edit mode:

```
"Thread "main" panicked with "CursorStyle::None should be handled separately in the client" at crates/gpui/src/platform/linux/wayland.rs:40:17"
```

Full log:
[stacktrace.txt](https://github.com/user-attachments/files/19814411/stacktrace.txt)

@smitbarmase, you seem to have worked on this code. Tagging you for
visibility :)

Release Notes:

- N/A