### 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
int AnimationTimelineEdit::get_buttons_width() const {
	Ref<Texture2D> interp_mode = get_editor_theme_icon(SNAME("TrackContinuous"));
	Ref<Texture2D> interp_type = get_editor_theme_icon(SNAME("InterpRaw"));
	Ref<Texture2D> loop_type = get_editor_theme_icon(SNAME("InterpWrapClamp"));
	Ref<Texture2D> remove_icon = get_editor_theme_icon(SNAME("Remove"));
	Ref<Texture2D> down_icon = get_theme_icon(SNAME("select_arrow"), SNAME("Tree"));
	int total_w = interp_mode->get_width() + interp_type->get_width() + loop_type->get_width() + remove_icon->get_width();
	total_w += (down_icon->get_width() + 4 * EDSCALE) * 4;
	return total_w;
}
int AnimationTimelineEdit::get_name_limit() const {
	Ref<Texture2D> hsize_icon = get_editor_theme_icon(SNAME("Hsize"));
	int limit = MAX(name_limit, add_track->get_minimum_size().width + hsize_icon->get_width());
	limit = MIN(limit, get_size().width - get_buttons_width() - 1);
	return limit;
}
void AnimationTimelineEdit::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_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")));
			add_track->set_icon(get_editor_theme_icon(SNAME("Add")));
			loop->set_icon(get_editor_theme_icon(SNAME("Loop")));
			time_icon->set_texture(get_editor_theme_icon(SNAME("Time")));
			add_track->get_popup()->clear();
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyValue")), TTR("Property Track"));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXPosition")), TTR("3D Position Track"));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXRotation")), TTR("3D Rotation Track"));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXScale")), TTR("3D Scale Track"));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyBlendShape")), TTR("Blend Shape Track"));