### 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
add_child(split_box);
	tree = memnew(FileSystemTree);
	tree->set_hide_root(true);
	SET_DRAG_FORWARDING_GCD(tree, FileSystemDock);
	tree->set_allow_rmb_select(true);
	tree->set_select_mode(Tree::SELECT_MULTI);
	tree->set_custom_minimum_size(Size2(0, 15 * EDSCALE));
	tree->set_column_clip_content(0, true);
	split_box->add_child(tree);
	tree->connect("item_activated", callable_mp(this, &FileSystemDock::_tree_activate_file));
	tree->connect("multi_selected", callable_mp(this, &FileSystemDock::_tree_multi_selected));
	tree->connect("item_mouse_selected", callable_mp(this, &FileSystemDock::_tree_rmb_select));
	tree->connect("empty_clicked", callable_mp(this, &FileSystemDock::_tree_empty_click));
	tree->connect("nothing_selected", callable_mp(this, &FileSystemDock::_tree_empty_selected));
	tree->connect("gui_input", callable_mp(this, &FileSystemDock::_tree_gui_input));
	tree->connect("mouse_exited", callable_mp(this, &FileSystemDock::_tree_mouse_exited));
	tree->connect("item_edited", callable_mp(this, &FileSystemDock::_rename_operation_confirm));
	file_list_vb = memnew(VBoxContainer);
	file_list_vb->set_v_size_flags(SIZE_EXPAND_FILL);
	split_box->add_child(file_list_vb);
	path_hb = memnew(HBoxContainer);
	file_list_vb->add_child(path_hb);
	file_list_search_box = memnew(LineEdit);
	file_list_search_box->set_h_size_flags(SIZE_EXPAND_FILL);
	file_list_search_box->set_placeholder(TTR("Filter Files"));
	file_list_search_box->connect("text_changed", callable_mp(this, &FileSystemDock::_search_changed).bind(file_list_search_box));
	path_hb->add_child(file_list_search_box);
	file_list_button_sort = _create_file_menu_button();
	path_hb->add_child(file_list_button_sort);
	button_file_list_display_mode = memnew(Button);