message: update ModalDialog TS definitions
diff: @@ -7,10 +7,12 @@ import { ButtonProps } from 'material-ui/Button';
  export interface DateTextFieldProps extends DialogProps {
  onAccept: ButtonProps['onClick'];
  onDismiss: ButtonProps['onClick'];
  + onClear: ButtonProps['onClick'];
  dialogContentClassName?: string;
  invalidLabel?: string;
  okLabel?: ReactNode;
  cancelLabel?: ReactNode;
  + clearLabel?: ReactNode;
  }
  declare const DateTextField: ComponentClass<DateTextFieldProps>;
  