### Godot version

4.1 dev2, 4.0.3

### System information

Windows 10, ryzen 5900x, radeon 6950xt (driver: 23.2.2)

### Issue description

There are two bugs:
- When I create a new node, it is created outside of the viewport. (as in first video)
- When I run the project, all the content inside the viewport dont appear. (as in second video)
I believe the second issue is related to the first.

Note: these problems are in RTL editors.

https://github.com/godotengine/godot/assets/121864036/84f0d434-0d1b-4c23-9fb0-510257e2e191


https://github.com/godotengine/godot/assets/121864036/b2bc20c7-1e2e-4d04-99e7-d66860ffced2




### Steps to reproduce

Videos explain.

### Minimal reproduction project

N/A
Control *prev_child = nullptr;
		if (from->is_set_as_top_level() || !Object::cast_to<Control>(from->get_parent())) {
			
			prev_child = _prev_control(from);
		} else {
			for (int i = (from->get_index() - 1); i >= 0; i--) {
				Control *c = Object::cast_to<Control>(from->get_parent()->get_child(i));
				if (!c || !c->is_visible_in_tree() || c->is_set_as_top_level()) {
					continue;
				}
				prev_child = c;
				break;
			}
			if (!prev_child) {
				prev_child = Object::cast_to<Control>(from->get_parent());
			} else {
				prev_child = _prev_control(prev_child);
			}
		}
		if (prev_child == from || prev_child == this) { 
			return (get_focus_mode() == FOCUS_ALL) ? prev_child : nullptr;
		}
		if (prev_child->get_focus_mode() == FOCUS_ALL) {
			return prev_child;
		}
		from = prev_child;
	}
	return nullptr;
}
void Control::set_focus_neighbor(Side p_side, const NodePath &p_neighbor) {