[2.0.16] "Restart Level" generates a new map

[IanLee1521]

I'm not 100% sure if this is expected or is a bug, but to me it feels like a bug, and wasn't what I expected.

When dying and selecting the "Restart Level" button, I expected to respawn on the same map as where I'd died. But instead I found myself on a regenerated map with a new seed.

I just tested again to confirm this works, and here are the steps I took.

1. Start a new map (I used seed `2333176592` with exchange string:

```
>>>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<<<
```

11-09-2024, 19-48-14.png (873.67 KiB) Viewed 183 times

11-09-2024, 19-48-44.png (117.03 KiB) Viewed 183 times

2. I then went out exploring to find a biter next and got myself killed.

11-09-2024, 19-48-51.png (211.43 KiB) Viewed 183 times

3. I clicked "Restart level", expecting to be on the same map just with everything reset, but instead found myself in a new map:

11-09-2024, 19-49-24.png (75.1 KiB) Viewed 183 times

---

This might or might not be the desired effect, but definitely wasn't what I expected to happen.

I would suggest the behavior of that button be updated to restart on the same same map, and not regenerate the map.