message: [config] data_dir short -d is confuse --dev easily. So remove sort.
diff: @@ -36,7 +36,7 @@ use structopt::StructOpt;
  #[derive(Debug, StructOpt)]
  #[structopt(name = "starcoin", about = "Starcoin")]
  pub struct StarcoinOpt {
  - #[structopt(short = "d", long, parse(from_os_str))]
  + #[structopt(long, parse(from_os_str))]
  /// Path to data dir
  pub data_dir: Option<PathBuf>,
  