### 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
const float distance = ABS(offset - pos.x);
							if (key_idx == -1 || distance < key_distance) {
								key_idx = i;
								key_distance = distance;
								hovering_key_idx = i;
							}
						} else {
							
							hovering_key_idx = i;
							break;
						}
					}
				}
				if (hovering_key_idx != previous_hovering_key_idx) {
					
					queue_redraw();
				}
			}
		}
	}
	if (mm.is_valid() && mm->get_button_mask().has_flag(MouseButtonMask::LEFT) && moving_selection_attempt) {
		if (!moving_selection) {
			moving_selection = true;
			emit_signal(SNAME("move_selection_begin"));
		}
		float new_ofs = (mm->get_position().x - timeline->get_name_limit()) / timeline->get_zoom_scale();
		emit_signal(SNAME("move_selection"), new_ofs - moving_selection_from_ofs);
	}
}
Variant AnimationTrackEdit::get_drag_data(const Point2 &p_point) {