discourse/app/assets/javascripts/discourse/controllers/keyboard-shortcuts-help.js.es6

import ModalFunctionality from 'discourse/mixins/modal-functionality';

export default Ember.Controller.extend(ModalFunctionality, {
  needs: ['modal'],

  onShow: function() {
    this.set('controllers.modal.modalClass', 'keyboard-shortcuts-modal');
  }
});