### Godot version

4.1.dev (dc625bcbfc5b587ba8867481ee7a1f6a567c25d0)

### System information

Mageia 9, Linux

### Issue description

When importing a project in current `master`, the following error is raised for each asset that gets imported:
```
Attempting to parent and popup a dialog that already has a parent.
```

It seems to be raised once per asset, caused by the progress dialog.

CC @bruvzg

### Steps to reproduce

- Import a new project in Godot that contains importable assets, e.g. https://github.com/RPicster/godot4-demo-desert-light

### Minimal reproduction project

See above.
if (size == p_callback.size && position == p_callback.position) {
		return;
	}
	position = p_callback.position;
	if (size != p_callback.size) {
		size = p_callback.size;
		_update_viewport_size();
	}
}
void Window::_propagate_window_notification(Node *p_node, int p_notification) {