### 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
ERR_FAIL_COND(!root);
	Node *node = get_node(p_path);
	ERR_FAIL_COND(!node);
	NodePath path_to = root->get_path_to(node, true);
	if (adding_track_type == Animation::TYPE_BLEND_SHAPE && !node->is_class("MeshInstance3D")) {
		EditorNode::get_singleton()->show_warning(TTR("Blend Shape tracks only apply to MeshInstance3D nodes."));
		return;
	}
	if ((adding_track_type == Animation::TYPE_POSITION_3D || adding_track_type == Animation::TYPE_ROTATION_3D || adding_track_type == Animation::TYPE_SCALE_3D) && !node->is_class("Node3D")) {
		EditorNode::get_singleton()->show_warning(TTR("Position/Rotation/Scale 3D tracks only apply to 3D-based nodes."));
		return;
	}
	switch (adding_track_type) {
		case Animation::TYPE_VALUE: {
			adding_track_path = path_to;
			prop_selector->set_type_filter(Vector<Variant::Type>());
			prop_selector->select_property_from_instance(node);
		} break;
		case Animation::TYPE_BLEND_SHAPE: {
			adding_track_path = path_to;
			Vector<Variant::Type> filter;
			filter.push_back(Variant::FLOAT);
			prop_selector->set_type_filter(filter);
			prop_selector->select_property_from_instance(node);
		} break;
		case Animation::TYPE_POSITION_3D:
		case Animation::TYPE_ROTATION_3D:
		case Animation::TYPE_SCALE_3D:
		case Animation::TYPE_METHOD: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();