### Godot version

v4.2.dev3.official [013e8e3af]

### System information

Godot v4.2.dev3 - macOS 13.4.1 - Vulkan (Forward+) - integrated Apple M1 - Apple M1 (8 Threads)

### Issue description

The content is empty. In the list `<Select Importer> `should be preselected, if possible. 
Or directly show the settings for "Animation Library" (check first selection).


![Bildschirmfoto 2023-08-22 um 01 29 44](https://github.com/godotengine/godot/assets/41921395/8300a756-ff54-4310-a0ad-04ad9525aeb9)


### Steps to reproduce

1. Project
2. Project Settings
3. Import Defaults 

https://github.com/godotengine/godot/assets/41921395/cb263c7d-27f0-4053-a555-0ed03ac7ef2a



### Minimal reproduction project

N/A
#include "import_defaults_editor.h"
#include "core/config/project_settings.h"
#include "core/io/resource_importer.h"
#include "editor/action_map_editor.h"
#include "editor/editor_autoload_settings.h"
#include "editor/editor_plugin_settings.h"
#include "editor/editor_sectioned_inspector.h"
#include "editor/localization_editor.h"
#include "editor/shader_globals_editor.h"
#include "scene/gui/center_container.h"
class ImportDefaultsEditorSettings : public Object {