### Godot version

v4.0.beta10.official [d0398f62f]

### System information

Windows 22H2, Compatibility, GeForce GTX 550 Ti

### Issue description

Multiple lines of error messages are copied without line breaks:
The script editor's error panel shows:
```
Line 6:Expected parameter name.
Line 6:Expected closing ")" after function parameters.
Line 6:Expected ":" after function declaration.
```
But selecting and copying them `ctrl c`, copies them without line breaks:
```
Line 6:Expected parameter name.Line 6:Expected closing ")" after function parameters.Line 6:Expected ":" after function declaration.
```


### Steps to reproduce

- start Godot
- open the attached project
- open the script `Node2D.gd`
The status bar shows an error message.
- click on the red circle with an x in it, and the number 3 to the right of the circle.
The script editor's error panel shows three messages:
>Line 6:Expected parameter name.
Line 6:Expected closing ")" after function parameters.
Line 6:Expected ":" after function declaration.

- select all three lines, and copy them `ctrl c`
- in the script editor, click on the empty line 12 to place the cursor there.
- paste `ctrl v`

### Expected
The copied lines should be pasted on three lines, as they appeared in the error panel.

### Observed
There are no line breaks, they appear on the same line:
```
Line 6:Expected parameter name.Line 6:Expected closing ")" after function parameters.Line 6:Expected ":" after function declaration.
```


### Minimal reproduction project

[issue, error messages copied without line breaks.zip](https://github.com/godotengine/godot/files/10361376/issue.error.messages.copied.without.line.breaks.zip)

method->set_text(p_method);
	tree->clear();
	TreeItem *root = tree->create_item();
	for (int i = 0; i < p_nodes.size(); i++) {
		List<Connection> all_connections;
		p_nodes[i]->get_signals_connected_to_this(&all_connections);
		for (const Connection &connection : all_connections) {
			if (connection.callable.get_method() != p_method) {
				continue;
			}
			TreeItem *node_item = tree->create_item(root);
			node_item->set_text(0, Object::cast_to<Node>(connection.signal.get_object())->get_name());
			node_item->set_icon(0, EditorNode::get_singleton()->get_object_icon(connection.signal.get_object(), "Node"));
			node_item->set_selectable(0, false);
			node_item->set_editable(0, false);
			node_item->set_text(1, connection.signal.get_name());
			Control *p = Object::cast_to<Control>(get_parent());
			node_item->set_icon(1, p->get_theme_icon(SNAME("Slot"), SNAME("EditorIcons")));
			node_item->set_selectable(1, false);
			node_item->set_editable(1, false);
			node_item->set_text(2, Object::cast_to<Node>(connection.callable.get_object())->get_name());
			node_item->set_icon(2, EditorNode::get_singleton()->get_object_icon(connection.callable.get_object(), "Node"));
			node_item->set_selectable(2, false);
			node_item->set_editable(2, false);
		}
	}
	popup_centered(Size2(600, 300) * EDSCALE);
}
ConnectionInfoDialog::ConnectionInfoDialog() {