### 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
err = ResourceSaver::save(res, new_path, ResourceSaver::FLAG_COMPRESS);
				if (err != OK) {
					EditorNode::get_singleton()->add_io_error(TTR("Error duplicating:") + " " + vformat(TTR("Failed to save resource at %s: %s"), new_path, error_names[err]));
				}
			} else if (err != OK) {
				
				
				EditorNode::get_singleton()->add_io_error(TTR("Error duplicating:") + " " + vformat(TTR("Failed to load resource at %s: %s"), new_path, error_names[err]));
			}
		}
	} else {
		
		Ref<DirAccess> old_dir = DirAccess::open(old_path);
		Ref<FileAccess> file_access = FileAccess::create(FileAccess::ACCESS_RESOURCES);
		old_dir->set_include_navigational(false);
		old_dir->list_dir_begin();
		for (String f = old_dir->_get_next(); !f.is_empty(); f = old_dir->_get_next()) {
			if (f.get_extension() == "import") {
				continue;
			}
			if (file_access->file_exists(old_path + f)) {
				_try_duplicate_item(FileOrFolder(old_path + f, true), new_path + f);
			} else if (da->dir_exists(old_path + f)) {
				_try_duplicate_item(FileOrFolder(old_path + f, false), new_path + f);
			}
		}
		old_dir->list_dir_end();
	}
}
void FileSystemDock::_update_resource_paths_after_move(const HashMap<String, String> &p_renames) const {