### Godot version

v4.1.rc2.official [46424488e]

### System information

Godot v4.1.rc2 - Linux Mint 20 (Ulyana) - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2060 SUPER (nvidia; 515.105.01) - Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 Threads)

### Issue description

Dragging and dropping a file to a new position inside its current folder, or onto the icon for its current folder - when that folder is the project root folder :res// - will be treated as though you were dropping a different file with the same name.

Expectation: for nothing to happen.

Also tried it in 4.0.3 and 4.1-dev3, where it behaves as expected.

https://github.com/godotengine/godot/assets/64640811/90de1120-dd92-41b8-b202-db77c343103a

### Steps to reproduce

1. New or existing project.
2. Click and drag a file in :res// in FileSystem dock.
3. Drop the file back into :res//.
4. Be prompted to overwrite or rename.

### Minimal reproduction project

N/A
emit_signal(SNAME("folder_removed"), p_folder);
	
	current_path = p_folder.get_base_dir();
	Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	while (!da->dir_exists(current_path)) {
		current_path = current_path.get_base_dir();
	}
	current_path_line_edit->set_text(current_path);
	EditorFileSystemDirectory *efd = EditorFileSystem::get_singleton()->get_filesystem_path(current_path);
	if (efd) {
		efd->force_update();
	}
}
void FileSystemDock::_rename_operation_confirm() {
	String new_name;
	TreeItem *s = tree->get_selected();
	int col_index = tree->get_selected_column();
	if (tree->has_focus()) {
		new_name = s->get_text(col_index).strip_edges();
	} else if (files->has_focus()) {
		new_name = files->get_edit_text().strip_edges();
	}
	String old_name = to_rename.is_file ? to_rename.path.get_file() : to_rename.path.left(-1).get_file();
	bool rename_error = false;