### 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
next_tag.name = String();
						err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, nullptr, true);
						if (err == ERR_FILE_EOF) {
							break;
						}
						if (err == OK && !assign.is_empty()) {
							if (project_manager) {
								if (assign == "interface/editor/project_manager_screen") {
									init_screen = value;
									break;
								}
							} else if (editor) {
								if (assign == "interface/editor/editor_screen") {
									init_screen = value;
									break;
								}
							}
						}
					}
				}
			}
		}
		if (found_project && EditorPaths::get_singleton()->is_self_contained()) {
			if (ProjectSettings::get_singleton()->get_resource_path() == OS::get_singleton()->get_executable_path().get_base_dir()) {
				ERR_PRINT("You are trying to run a self-contained editor at the same location as a project. This is not allowed, since editor files will mix with project files.");
				OS::get_singleton()->set_exit_code(EXIT_FAILURE);
				return FAILED;
			}
		}
	}