How to create multiple windows in multiple monitors?

## Bevy version

main branch (lastest commit is `cd447fb4e68716fb908158ab9ca64d13746a6b97`).

## \[Optional\] Relevant system information

AdapterInfo { name: "Apple M1", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }

SystemInfo { os: "MacOS 13.0 ", kernel: "22.1.0", cpu: "Apple M1", core_count: "8", memory: "16.0 GiB" }

[DisplayInfo { id: 1, x: 0, y: 0, width: 1440, height: 900, rotation: 0.0, scale_factor: 2.0, is_primary: true }, DisplayInfo { id: 2, x: -264, y: -1080, width: 1920, height: 1080, rotation: 0.0, scale_factor: 1.0, is_primary: false }]

## What you did

I'm trying to run offical example `multiple_windows` and want second window putted on second monitor. I tried
```
let second_window = commands
.spawn(Window {
title: "Second window".to_owned(),
position: WindowPosition::At(IVec2::new(-264, -1080)),
resolution: WindowResolution::new(1920., 1080.),
..default()
})
.id();
```
and
```
let second_window = commands
.spawn(Window {
title: "Second window".to_owned(),
position: WindowPosition::Centered(MonitorSelection::Index(1)), // I tried 0,1,2,3 here
resolution: WindowResolution::new(1920., 1080.),
..default()
})
.id();
```

## What went wrong

The second window is always on my primary monitor.