### Godot version

4.2 dev3

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

If you have a Method Track with multiple calls to the same method, they are joined together and makes things unreadable:
![image](https://github.com/godotengine/godot/assets/2223172/a2ab8446-28a1-440b-b0d5-5049f5d705b4)
The horizontal line shouldn't be used here. I think it might be a regression.

### Steps to reproduce

1. Add AnimationPlayer
2. Add a Method Track (with Add Track button)
3. Add some key to the track
4. Add another key with the same method

### Minimal reproduction project

N/A
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Track Path"));
	undo_redo->add_do_method(animation.ptr(), "track_set_path", track, p_text);
	undo_redo->add_undo_method(animation.ptr(), "track_set_path", track, animation->track_get_path(track));
	undo_redo->commit_action();
	path_popup->hide();
}
bool AnimationTrackEdit::_is_value_key_valid(const Variant &p_key_value, Variant::Type &r_valid_type) const {
	if (root == nullptr) {
		return false;
	}
	Ref<Resource> res;
	Vector<StringName> leftover_path;
	Node *node = root->get_node_and_resource(animation->track_get_path(track), res, leftover_path);
	Object *obj = nullptr;
	if (res.is_valid()) {
		obj = res.ptr();
	} else if (node) {
		obj = node;
	}
	bool prop_exists = false;
	if (obj) {
		r_valid_type = obj->get_static_property_type_indexed(leftover_path, &prop_exists);
	}
	return (!prop_exists || Variant::can_convert(p_key_value.get_type(), r_valid_type));
}
Ref<Texture2D> AnimationTrackEdit::_get_key_type_icon() const {