Use `service' instead of `service_description' when searching for services

refs #8613

library/Icinga/Web/Widget/FilterEditor.php

@@ -183,7 +183,7 @@ class FilterEditor extends AbstractWidget
                 // TODO: Ask the view for (multiple) search columns
                 switch($request->getActionName()) {
                     case 'services':
-                        $searchCol = 'service_description';
+                        $searchCol = 'service';
                         break;
                     case 'hosts':
                         $searchCol = 'host';