### 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.
undo_redo->create_action(TTR("Animation Change Keyframe Time"), UndoRedo::MERGE_ENDS);
	if (existing != -1) {
		undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", track, animation->track_get_key_time(track, existing));
	}
	undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", track, key_data_cache.time);
	undo_redo->add_do_method(animation.ptr(), "track_insert_key", track, new_time, key_data_cache.value, key_data_cache.transition);
	undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", track, new_time);
	undo_redo->add_undo_method(animation.ptr(), "track_insert_key", track, key_data_cache.time, key_data_cache.value, key_data_cache.transition);
	if (existing != -1) {
		undo_redo->add_undo_method(animation.ptr(), "track_insert_key", track, animation->track_get_key_time(track, existing), animation->track_get_key_value(track, existing), animation->track_get_key_transition(track, existing));
	}
	
	AnimationPlayerEditor *ape = AnimationPlayerEditor::get_singleton();
	if (ape) {
		AnimationTrackEditor *ate = ape->get_track_editor();
		if (ate) {
			undo_redo->add_do_method(ate, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(ate, "_clear_selection_for_anim", animation);
			undo_redo->add_do_method(ate, "_select_at_anim", animation, track, new_time);
			undo_redo->add_undo_method(ate, "_select_at_anim", animation, track, key_data_cache.time);
		}
	}
	undo_redo->commit_action();
}
AnimationTrackKeyEditEditor::AnimationTrackKeyEditEditor(Ref<Animation> p_animation, int p_track, real_t p_key_ofs, bool p_use_fps) {
	if (!p_animation.is_valid()) {
		return;
	}
	animation = p_animation;
	track = p_track;