### Godot version

4.0.dev

### System information

win11，core i7 13700,  GTX4090

### Issue description

Just look at this gif.

![screenshots](https://user-images.githubusercontent.com/1620585/225354749-6ea17059-95b2-45e0-9765-8505e92726eb.gif)

It seems that it was block by Static Type Checking.

![image](https://user-images.githubusercontent.com/1620585/225362874-507ff0ec-c6d8-4a25-9a16-89db1885ad02.png)

If it's right.

Why it doesn't just disable other option except for String and StringName?

### Steps to reproduce

1. first select string type
2. input a text
3. change type
4. change back to string  -- it don't work
5. change to stringname -- it works
6. change back to string -- it works

### Minimal reproduction project

I think it don't need reproduction project.
dragging_hsize = false;
	}
	if (mb.is_valid() && mb->get_position().x > get_name_limit() && mb->get_position().x < (get_size().width - get_buttons_width())) {
		if (!panner->is_panning() && mb->get_button_index() == MouseButton::LEFT) {
			int x = mb->get_position().x - get_name_limit();
			float ofs = x / get_zoom_scale() + get_value();
			emit_signal(SNAME("timeline_changed"), ofs, false, mb->is_alt_pressed());
			dragging_timeline = true;
		}
	}
	if (dragging_timeline && mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
		dragging_timeline = false;
	}
	Ref<InputEventMouseMotion> mm = p_event;
	if (mm.is_valid()) {
		if (dragging_hsize) {
			int ofs = mm->get_position().x - dragging_hsize_from;
			name_limit = dragging_hsize_at + ofs;
			queue_redraw();
			emit_signal(SNAME("name_limit_changed"));
			play_position->queue_redraw();
		}
		if (dragging_timeline) {
			int x = mm->get_position().x - get_name_limit();
			float ofs = x / get_zoom_scale() + get_value();
			emit_signal(SNAME("timeline_changed"), ofs, false, mm->is_alt_pressed());
		}
	}
}
Control::CursorShape AnimationTimelineEdit::get_cursor_shape(const Point2 &p_pos) const {