Issue #3322900 by Djeka, artem_sylchuk: "Enter" key does not work after one message is sent.

   * @param {Object} context The context.

   */

  function submitButtonListener(context) {

    $(context).find('.private-message-add-form textarea').once('private-message-form-submit-button-listener').each(function () {

    $(context).parent().find('.private-message-add-form textarea').once('private-message-form-submit-button-listener').each(function () {

      $(this).keyup(submitKeyPress);

    });

  }