Fix option template for selected option.
Fix option template for selected option.

basvandenberg/angular2-select,basvandenberg/angular2-select,basvandenberg/ng-select,benelliott/angular2-select,benelliott/angular2-select,basvandenberg/angular2-select,benelliott/angular2-select,benelliott/angular2-select,basvandenberg/ng-select,basvandenberg/ng-select,basvandenberg/ng-select