### 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
if (check_rect.has_point(pos)) {
				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				undo_redo->create_action(TTR("Toggle Track Enabled"));
				undo_redo->add_do_method(animation.ptr(), "track_set_enabled", track, !animation->track_is_enabled(track));
				undo_redo->add_undo_method(animation.ptr(), "track_set_enabled", track, animation->track_is_enabled(track));
				undo_redo->commit_action();
				queue_redraw();
				accept_event();
			}
			
			if (path_rect.has_point(pos + Size2(type_icon->get_width(), 0))) {
				clicking_on_name = true;
				accept_event();
			}
			if (update_mode_rect.has_point(pos)) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect("id_pressed", callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}
				menu->clear();
				if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
					menu->add_icon_item(get_editor_theme_icon(SNAME("UseBlendEnable")), TTR("Use Blend"), MENU_USE_BLEND_ENABLED);
					menu->add_icon_item(get_editor_theme_icon(SNAME("UseBlendDisable")), TTR("Don't Use Blend"), MENU_USE_BLEND_DISABLED);
				} else {
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackContinuous")), TTR("Continuous"), MENU_CALL_MODE_CONTINUOUS);
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackDiscrete")), TTR("Discrete"), MENU_CALL_MODE_DISCRETE);
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackCapture")), TTR("Capture"), MENU_CALL_MODE_CAPTURE);
				}
				menu->reset_size();