### Godot version

4.1 24cb43a

### System information

Windows 10 x64

### Issue description

Every time I launch Godot, I'm greeted with this in my console:
```
ERROR: Resource file not found: res://InputEventKey_7cuxk.
   at: (core\io\resource_loader.cpp:227)
```
Seems to be only happening in Project Manager and comes from this:
![](https://chat.godotengine.org/file-upload/udqZP8NQfogp4rjRL/Clipboard%20-%2021%20kwietnia%202023%2022:24)
It's part of my `editor_settings-4.tres`. I didn't test, but I think it applies to any shortcut that you customize. For some reason ResourceLoader tries to load it as a project resource, while it's a sub-resource.

Does not happen in 4.0.2.

### Steps to reproduce

1. Open Godot 4.1 project manager
2. Check the console

### Minimal reproduction project

N/A
err = docsrc.load_classes(path);
				ERR_FAIL_COND_V_MSG(err != OK, false, "Error loading docs from: " + path + ": " + itos(err));
			}
		}
		String index_path = doc_tool_path.path_join("doc/classes");
		/
		Ref<DirAccess> da = DirAccess::create_for_path(index_path);
		err = da->make_dir_recursive(index_path);
		ERR_FAIL_COND_V_MSG(err != OK, false, "Error: Can't create index directory: " + index_path + ": " + itos(err));
		print_line("Loading classes from: " + index_path);
		err = docsrc.load_classes(index_path);
		ERR_FAIL_COND_V_MSG(err != OK, false, "Error loading classes from: " + index_path + ": " + itos(err));
		checked_paths.insert(index_path);
		print_line("Merging docs...");
		doc.merge_from(docsrc);
		for (const String &E : checked_paths) {
			print_line("Erasing old docs at: " + E);
			err = DocTools::erase_classes(E);
			ERR_FAIL_COND_V_MSG(err != OK, false, "Error erasing old docs at: " + E + ": " + itos(err));
		}
		print_line("Generating new docs...");
		err = doc.save_classes(index_path, doc_data_classes);
		ERR_FAIL_COND_V_MSG(err != OK, false, "Error saving new docs:" + itos(err));
		print_line("Deleting docs cache...");
		if (FileAccess::exists(EditorHelp::get_cache_full_path())) {
			DirAccess::remove_file_or_error(EditorHelp::get_cache_full_path());
		}
		OS::get_singleton()->set_exit_code(EXIT_SUCCESS);
		return false;
	}