### 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
ERR_MAIN_THREAD_GUARD;
	ERR_FAIL_COND(!is_inside_tree());
	if (!has_focus()) {
		return;
	}
	get_viewport()->gui_release_focus();
}
static Control *_next_control(Control *p_from) {
	if (p_from->is_set_as_top_level()) {
		return nullptr; 
	}
	Control *parent = Object::cast_to<Control>(p_from->get_parent());
	if (!parent) {
		return nullptr;
	}
	int next = p_from->get_index();
	ERR_FAIL_INDEX_V(next, parent->get_child_count(), nullptr);
	for (int i = (next + 1); i < parent->get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(parent->get_child(i));
		if (!c || !c->is_visible_in_tree() || c->is_set_as_top_level()) {
			continue;
		}
		return c;
	}
	
	return _next_control(parent);
}
Control *Control::find_next_valid_focus() const {