svoid mapMethodLike dm_floatFieldSetterDialog(S field, O... _) {
  DynModule m = dm_current_mandatory();
  S humanized = humanizeFormLabel(field);
  JTextField tf = jtextfield(get(m, field));
  showFormTitled(or2(stringOptPar(_, 'formTitle), "Set " + humanized),
    humanized + ":", tf, r {
      m.setField(field, parseFloat(gtt(tf)));
      callF(optPar(_, 'onSet));
    });
}

Began life as a copy of #1027015