### 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
ClassDB::bind_method(D_METHOD("_update_obj"), &AnimationTrackKeyEdit::_update_obj);
	ClassDB::bind_method(D_METHOD("_key_ofs_changed"), &AnimationTrackKeyEdit::_key_ofs_changed);
	ClassDB::bind_method(D_METHOD("_hide_script_from_inspector"), &AnimationTrackKeyEdit::_hide_script_from_inspector);
	ClassDB::bind_method(D_METHOD("_hide_metadata_from_inspector"), &AnimationTrackKeyEdit::_hide_metadata_from_inspector);
	ClassDB::bind_method(D_METHOD("get_root_path"), &AnimationTrackKeyEdit::get_root_path);
	ClassDB::bind_method(D_METHOD("_dont_undo_redo"), &AnimationTrackKeyEdit::_dont_undo_redo);
	ClassDB::bind_method(D_METHOD("_is_read_only"), &AnimationTrackKeyEdit::_is_read_only);
}
void AnimationTrackKeyEdit::_fix_node_path(Variant &value) {