### 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
} else if (init_fullscreen) {
		DisplayServer::get_singleton()->window_set_mode(DisplayServer::WINDOW_MODE_FULLSCREEN);
	}
	if (init_always_on_top) {
		DisplayServer::get_singleton()->window_set_flag(DisplayServer::WINDOW_FLAG_ALWAYS_ON_TOP, true);
	}
	MAIN_PRINT("Main: Load Boot Image");
	Color clear = GLOBAL_DEF_BASIC("rendering/environment/defaults/default_clear_color", Color(0.3, 0.3, 0.3));
	RenderingServer::get_singleton()->set_default_clear_color(clear);
	if (show_logo) { 
		const bool boot_logo_image = GLOBAL_DEF_BASIC("application/boot_splash/show_image", true);
		const String boot_logo_path = String(GLOBAL_DEF_BASIC(PropertyInfo(Variant::STRING, "application/boot_splash/image", PROPERTY_HINT_FILE, "*.png"), String())).strip_edges();
		const bool boot_logo_scale = GLOBAL_DEF_BASIC("application/boot_splash/fullsize", true);
		const bool boot_logo_filter = GLOBAL_DEF_BASIC("application/boot_splash/use_filter", true);
		Ref<Image> boot_logo;
		if (boot_logo_image) {
			if (!boot_logo_path.is_empty()) {
				boot_logo.instantiate();
				Error load_err = ImageLoader::load_image(boot_logo_path, boot_logo);
				if (load_err) {
					ERR_PRINT("Non-existing or invalid boot splash at '" + boot_logo_path + "'. Loading default splash.");
				}
			}
		} else {
			
			boot_logo.instantiate();
			boot_logo->initialize_data(1, 1, false, Image::FORMAT_RGBA8);
			boot_logo->set_pixel(0, 0, Color(0, 0, 0, 0));
		}
		Color boot_bg_color = GLOBAL_GET("application/boot_splash/bg_color");