### Godot version

4.1 rc3

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

This™
![image](https://github.com/godotengine/godot/assets/2223172/cb33110f-a5b0-400a-951f-3fa425f05714)

It can still happen, but it's more difficult to trigger.

### Steps to reproduce

1. Create a new scene with a Control node
2. Add Theme to the Control
3. Open Theme Editor
4. Clear the `theme` property in Control
5. Save, with Theme Editor opened
6. Restart

### Minimal reproduction project

N/A
String rendering_method = renderer->get_item_metadata(p_which);
	String current_renderer = GLOBAL_GET("rendering/renderer/rendering_method");
	if (rendering_method == current_renderer) {
		return;
	}
	renderer_request = rendering_method;
	video_restart_dialog->popup_centered();
	renderer->select(renderer_current);
	_update_renderer_color();
}
void EditorNode::_resource_saved(Ref<Resource> p_resource, const String &p_path) {
	if (singleton->saving_resources_in_path.has(p_resource)) {
		
		return;
	}
	if (EditorFileSystem::get_singleton()) {
		EditorFileSystem::get_singleton()->update_file(p_path);
	}
	singleton->editor_folding.save_resource_folding(p_resource, p_path);
}
void EditorNode::_resource_loaded(Ref<Resource> p_resource, const String &p_path) {
	singleton->editor_folding.load_resource_folding(p_resource, p_path);
}
void EditorNode::_feature_profile_changed() {