static JComponent dm_passwordFieldAndSubmit(S field, fS submitMethodName, O... _) {
  final DynModule m = dm_current_mandatory();
  ret dm_passwordFieldAndSubmit(field, rThread { call(m, submitMethodName) }, _);
}

static JComponent dm_passwordFieldAndSubmit(S field, Runnable action, O... _) {
  JPasswordField tf = boolPar centered(_) ? dm_centeredPasswordField(field) : dm_passwordField(field);
  if (boolPar focusOnShow(_)) focusAndSelectAllOnShow(tf);
  ret centerAndEastWithMargin(onEnter(tf, action),
    jbutton(optPar buttonText(_, "Submit"), action));
}

Began life as a copy of #1021020