### Godot version

4.0.dev(0810ecaafdbee3ea747219e6ab3a8de5d2216a09)

### System information

any

### Issue description

https://user-images.githubusercontent.com/61938263/215898051-8506b45e-a9d4-4c3f-b1b3-28f202dea67b.mp4



### Steps to reproduce

Editt AnimationBlendTree

### Minimal reproduction project

N/A
if (updating) {
		return;
	}
	updating = true;
	set_block_minimum_size_adjust(true);
	Rect2 screen;
	for (int i = 0; i < get_child_count(); i++) {
		GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
		if (!gn) {
			continue;
		}
		Rect2 r;
		r.position = gn->get_position_offset() * zoom;
		r.size = gn->get_size() * zoom;
		screen = screen.merge(r);
	}
	screen.position -= get_size();