ListController: Fix servicegrid grouping when applying group restrictions

Quickfix only.

refs #10316

modules/monitoring/application/controllers/ListController.php

@@ -545,6 +545,7 @@ class ListController extends Controller
         $this->applyRestriction('monitoring/filter/objects', $query);
         $this->filterQuery($query);
         $filter = (bool) $this->params->shift('problems', false) ? Filter::where('service_problem', 1) : null;
+        $query->getQuery()->setGroupBase(array());
         $pivot = $query
             ->pivot(
                 'service_description',

modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php

@@ -990,6 +990,12 @@ abstract class IdoQuery extends DbQuery
         return $this;
     }
 
+    public function setGroupBase(array $groupBase)
+    {
+        $this->groupBase = $groupBase;
+        return $this;
+    }
+
     /**
      * Register the GROUP BY columns required for the given alias
      *