fohow_admin/app/assets/javascripts/rails_admin/custom/ckeditor_ajax.js.coffee

$(document).ready ->
  $(document).on 'mousedown', '.save-action', (e) -> # triggers also when submitting form with enter
    return true unless window.CKEDITOR?
    for instance of CKEDITOR.instances
      editor = CKEDITOR.instances[instance]
      if editor.checkDirty()
        editor.updateElement();
    return true;