### 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
return edit;
}
void AnimationTrackEditor::_notification(int p_what) {
	switch (p_what) {
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			panner->setup((ViewPanner::ControlScheme)EDITOR_GET("editors/panning/animation_editors_panning_scheme").operator int(), ED_GET_SHORTCUT("canvas_item_editor/pan_view"), bool(EDITOR_GET("editors/panning/simple_panning")));
		} break;
		case NOTIFICATION_ENTER_TREE: {
			panner->setup((ViewPanner::ControlScheme)EDITOR_GET("editors/panning/animation_editors_panning_scheme").operator int(), ED_GET_SHORTCUT("canvas_item_editor/pan_view"), bool(EDITOR_GET("editors/panning/simple_panning")));
			[[fallthrough]];
		}
		case NOTIFICATION_THEME_CHANGED: {
			zoom_icon->set_texture(get_editor_theme_icon(SNAME("Zoom")));
			bezier_edit_icon->set_icon(get_editor_theme_icon(SNAME("EditBezier")));
			snap->set_icon(get_editor_theme_icon(SNAME("Snap")));
			view_group->set_icon(get_editor_theme_icon(view_group->is_pressed() ? SNAME("AnimationTrackList") : SNAME("AnimationTrackGroup")));
			selected_filter->set_icon(get_editor_theme_icon(SNAME("AnimationFilter")));
			imported_anim_warning->set_icon(get_editor_theme_icon(SNAME("NodeWarning")));
			main_panel->add_theme_style_override("panel", get_theme_stylebox(SNAME("panel"), SNAME("Tree")));
			edit->get_popup()->set_item_icon(edit->get_popup()->get_item_index(EDIT_APPLY_RESET), get_editor_theme_icon(SNAME("Reload")));
		} break;
		case NOTIFICATION_READY: {
			EditorNode::get_singleton()->get_editor_selection()->connect("selection_changed", callable_mp(this, &AnimationTrackEditor::_selection_changed));
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			update_keying();
		} break;
	}
}
void AnimationTrackEditor::_update_scroll(double) {