### 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 (!path) {
			path_popup = memnew(Popup);
			path_popup->set_wrap_controls(true);
			add_child(path_popup);
			path = memnew(LineEdit);
			path_popup->add_child(path);
			path->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
			path->connect("text_submitted", callable_mp(this, &AnimationTrackEdit::_path_submitted));
		}
		path->set_text(animation->track_get_path(track));
		Vector2 theme_ofs = path->get_theme_stylebox(SNAME("normal"), SNAME("LineEdit"))->get_offset();
		path_popup->set_position(get_screen_position() + path_rect.position - theme_ofs);
		path_popup->set_size(path_rect.size);
		path_popup->popup();
		path->grab_focus();
		path->set_caret_column(path->get_text().length());
		clicking_on_name = false;
	}
	if (mb.is_valid() && moving_selection_attempt) {
		if (!mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
			moving_selection_attempt = false;
			if (moving_selection) {
				emit_signal(SNAME("move_selection_commit"));
			} else if (select_single_attempt != -1) {
				emit_signal(SNAME("select_key"), select_single_attempt, true);
			}
			moving_selection = false;
			select_single_attempt = -1;
		}
		if (moving_selection && mb->is_pressed() && mb->get_button_index() == MouseButton::RIGHT) {