### 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
last_menu_track_opt = p_option;
	switch (p_option) {
		case EDIT_COPY_TRACKS: {
			track_copy_select->clear();
			TreeItem *troot = track_copy_select->create_item();
			for (int i = 0; i < animation->get_track_count(); i++) {
				NodePath path = animation->track_get_path(i);
				Node *node = nullptr;
				if (root && root->has_node(path)) {
					node = root->get_node(path);
				}
				String text;
				Ref<Texture2D> icon = get_editor_theme_icon(SNAME("Node"));
				if (node) {
					if (has_theme_icon(node->get_class(), EditorStringName(EditorIcons))) {
						icon = get_editor_theme_icon(node->get_class());
					}
					text = node->get_name();
					Vector<StringName> sn = path.get_subnames();
					for (int j = 0; j < sn.size(); j++) {
						text += ".";
						text += sn[j];
					}
					path = NodePath(node->get_path().get_names(), path.get_subnames(), true); 
				} else {
					text = path;