### Godot version

v4.0.beta.custom_build [eaf306e0b]

### System information

Windows 10

### Issue description

Selecting a `Window` node in the Editor's SceneTree results in the message
```
editor/editor_data.cpp:1058 - Parameter "p_node" is null.
```
and the Inspector shows empty content instead of the Window's properties.

I would expect, that clicking on a node in the SceneTree lets me edit the properties of the node.

Bisecting shows that this behavior got introduced in #71770

### Steps to reproduce

1. Create a Window node
2. Click on the Window node in the Editor's SceneTree

### Minimal reproduction project

N/A
c = CURSOR_FDIAGSIZE;
			break;
		case DRAG_TOP_RIGHT:
		case DRAG_BOTTOM_LEFT:
			c = rotation_array[(rotation_array_index + 1) % 4];
			break;
		case DRAG_MOVE:
			c = CURSOR_MOVE;
			break;
		default:
			break;
	}
	if (is_hovering_h_guide) {
		c = CURSOR_VSIZE;
	} else if (is_hovering_v_guide) {
		c = CURSOR_HSIZE;
	}
	if (pan_pressed) {
		c = CURSOR_DRAG;
	}
	if (c != viewport->get_default_cursor_shape()) {
		viewport->set_default_cursor_shape(c);
		
		if (viewport->get_global_rect().has_point(get_global_mouse_position())) {
			DisplayServer::CursorShape ds_cursor_shape = (DisplayServer::CursorShape)viewport->get_default_cursor_shape();
			DisplayServer::get_singleton()->cursor_set_shape(ds_cursor_shape);
		}
	}
}
void CanvasItemEditor::_draw_text_at_position(Point2 p_position, String p_string, Side p_side) {