### Godot version

4.1 dev3

### 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

Trying to move a folder results in moving error and it's not moved.
Regression from #75330

A fix already exists, but I'm opening an issue so it's not lost (the PR isn't ready and not very active).

### Steps to reproduce

1. Add 2 folders in filesystem
2. Move one folder into another one

### Minimal reproduction project

N/A
make_dir_dialog = memnew(DirectoryCreateDialog);
	add_child(make_dir_dialog);
	make_dir_dialog->connect("dir_created", callable_mp(this, &FileSystemDock::_rescan));
	make_scene_dialog = memnew(SceneCreateDialog);
	add_child(make_scene_dialog);
	make_scene_dialog->connect("confirmed", callable_mp(this, &FileSystemDock::_make_scene_confirm));
	make_script_dialog = memnew(ScriptCreateDialog);
	make_script_dialog->set_title(TTR("Create Script"));
	add_child(make_script_dialog);
	make_shader_dialog = memnew(ShaderCreateDialog);
	add_child(make_shader_dialog);
	new_resource_dialog = memnew(CreateDialog);
	add_child(new_resource_dialog);
	new_resource_dialog->set_base_type("Resource");
	new_resource_dialog->connect("create", callable_mp(this, &FileSystemDock::_resource_created));
	searched_string = String();
	uncollapsed_paths_before_search = Vector<String>();
	tree_update_id = 0;
	history_pos = 0;
	history_max_size = 20;
	history.push_back("res://");
	display_mode = DISPLAY_MODE_TREE_ONLY;
	old_display_mode = DISPLAY_MODE_TREE_ONLY;
	file_list_display_mode = FILE_LIST_DISPLAY_THUMBNAILS;
	add_resource_tooltip_plugin(memnew(EditorTextureTooltipPlugin));
}
FileSystemDock::~FileSystemDock() {
	singleton = nullptr;
}