### 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
} break;
		case EDIT_EASE_SELECTION: {
			ease_dialog->popup_centered(Size2(200, 100) * EDSCALE);
		} break;
		case EDIT_EASE_CONFIRM: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Make Easing Keys"));
			Tween::TransitionType transition_type = static_cast<Tween::TransitionType>(transition_selection->get_selected_id());
			Tween::EaseType ease_type = static_cast<Tween::EaseType>(ease_selection->get_selected_id());
			float fps = ease_fps->get_value();
			double dur_step = 1.0 / fps;
			
			HashMap<int, Vector<int>> keymap;
			Vector<int> tracks;
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				if (!tracks.has(E.key.track)) {
					tracks.append(E.key.track);
				}
			}
			for (int i = 0; i < tracks.size(); i++) {
				switch (animation->track_get_type(tracks[i])) {
					case Animation::TYPE_VALUE:
					case Animation::TYPE_POSITION_3D:
					case Animation::TYPE_ROTATION_3D:
					case Animation::TYPE_SCALE_3D:
					case Animation::TYPE_BLEND_SHAPE: {
						Vector<int> keys;
						for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
							if (E.key.track == tracks[i]) {
								keys.append(E.key.key);