### 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
ADD_SIGNAL(MethodInfo("timeline_changed", PropertyInfo(Variant::FLOAT, "position"), PropertyInfo(Variant::BOOL, "drag"), PropertyInfo(Variant::BOOL, "timeline_only")));
	ADD_SIGNAL(MethodInfo("remove_request", PropertyInfo(Variant::INT, "track")));
	ADD_SIGNAL(MethodInfo("dropped", PropertyInfo(Variant::INT, "from_track"), PropertyInfo(Variant::INT, "to_track")));
	ADD_SIGNAL(MethodInfo("insert_key", PropertyInfo(Variant::FLOAT, "offset")));
	ADD_SIGNAL(MethodInfo("select_key", PropertyInfo(Variant::INT, "index"), PropertyInfo(Variant::BOOL, "single")));
	ADD_SIGNAL(MethodInfo("deselect_key", PropertyInfo(Variant::INT, "index")));
	ADD_SIGNAL(MethodInfo("move_selection_begin"));
	ADD_SIGNAL(MethodInfo("move_selection", PropertyInfo(Variant::FLOAT, "offset")));
	ADD_SIGNAL(MethodInfo("move_selection_commit"));
	ADD_SIGNAL(MethodInfo("move_selection_cancel"));
	ADD_SIGNAL(MethodInfo("duplicate_request"));
	ADD_SIGNAL(MethodInfo("create_reset_request"));
	ADD_SIGNAL(MethodInfo("duplicate_transpose_request"));
	ADD_SIGNAL(MethodInfo("delete_request"));
}
AnimationTrackEdit::AnimationTrackEdit() {
	play_position = memnew(Control);
	play_position->set_mouse_filter(MOUSE_FILTER_PASS);
	add_child(play_position);
	play_position->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
	play_position->connect("draw", callable_mp(this, &AnimationTrackEdit::_play_position_draw));
	set_focus_mode(FOCUS_CLICK);
	set_mouse_filter(MOUSE_FILTER_PASS); 
}
AnimationTrackEdit *AnimationTrackEditPlugin::create_value_track_edit(Object *p_object, Variant::Type p_type, const String &p_property, PropertyHint p_hint, const String &p_hint_string, int p_usage) {