### 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
List<_AnimMoveRestore> to_restore;
			
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				undo_redo->add_do_method(animation.ptr(), "track_remove_key", E->key().track, E->key().key);
			}
			
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float newtime = (E->get().pos - from_t) * s + from_t;
				int idx = animation->track_find_key(E->key().track, newtime, Animation::FIND_MODE_APPROX);
				if (idx == -1) {
					continue;
				}
				SelectedKey sk;
				sk.key = idx;
				sk.track = E->key().track;
				if (selection.has(sk)) {
					continue; 
				}
				undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", E->key().track, newtime);
				_AnimMoveRestore amr;
				amr.key = animation->track_get_key_value(E->key().track, idx);
				amr.track = E->key().track;
				amr.time = newtime;
				amr.transition = animation->track_get_key_transition(E->key().track, idx);
				to_restore.push_back(amr);
			}
#define NEW_POS(m_ofs) (((s > 0) ? m_ofs : from_t + (len - (m_ofs - from_t))) - pivot) * ABS(s) + from_t
			
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float newpos = NEW_POS(E->get().pos);