public ActionResult Index(SiteMVC.Models.Engine.AdvertismentsFilter filter)
        {
            var filterViewModel = new FilterViewModel();

            //--- copy filter from original
            if (filter != null)
            {
                filterViewModel.Filter = filter;
            }

            ViewBag.RoomsFilterList = filterViewModel.GetRoomsCountCategoriesList();

            return(View(filterViewModel));
        }