discourse/app/assets/javascripts/admin/controllers/admin_site_settings_controller.js

(function() {

  window.Discourse.AdminSiteSettingsController = Ember.ArrayController.extend(Discourse.Presence, {
    filter: null,
    onlyOverridden: false,
    filteredContent: (function() {
      var filter,
        _this = this;
      if (!this.present('content')) {
        return null;
      }
      if (this.get('filter')) {
        filter = this.get('filter').toLowerCase();
      }
      return this.get('content').filter(function(item, index, enumerable) {
        if (_this.get('onlyOverridden') && !item.get('overridden')) {
          return false;
        }
        if (filter) {
          if (item.get('setting').toLowerCase().indexOf(filter) > -1) {
            return true;
          }
          if (item.get('description').toLowerCase().indexOf(filter) > -1) {
            return true;
          }
          if (item.get('value').toLowerCase().indexOf(filter) > -1) {
            return true;
          }
          return false;
        } else {
          return true;
        }
      });
    }).property('filter', 'content.@each', 'onlyOverridden'),
    resetDefault: function(setting) {
      setting.set('value', setting.get('default'));
      return setting.save();
    },
    save: function(setting) {
      return setting.save();
    },
    cancel: function(setting) {
      return setting.resetValue();
    }
  });

}).call(this);