### Godot version

4.0.dev(2fdaf2919c03ab50f971f2d51616d4ee329d29af)

### System information

any

### Issue description

AnimationPlayer is unintentionally hidden.

https://user-images.githubusercontent.com/61938263/217088704-c1ad44d6-ef7b-4b10-b351-f9f9fa166e39.mp4


### Steps to reproduce

Select AnimationTree -> Select AnimationPlayer

### Minimal reproduction project

N/A
slash_idx = parent.rfind("/", slash_idx - 1);
					parent = (slash_idx >= 0 && parent.length() > 1) ? parent.substr(slash_idx + 1) : parent;
					r_filenames.write[set_idx] = parent + r_filenames[set_idx];
				}
			}
			
			bool can_proceed = false;
			RBSet<int>::Element *E = iset.front();
			while (E) {
				String scene_name = r_filenames[E->get()];
				bool duplicate_found = false;
				for (const int &F : iset) {
					if (E->get() == F) {
						continue;
					}
					String other_scene_name = r_filenames[F];
					if (other_scene_name == scene_name) {
						duplicate_found = true;
						break;
					}
				}
				RBSet<int>::Element *to_erase = duplicate_found ? nullptr : E;
				
				
				
				
				
				String path = p_full_paths[E->get()];
				
				scene_name = scene_name.get_basename();