Use isIcinga2() in the ToggleInstanceFeaturesCommandForm

modules/monitoring/application/controllers/HealthController.php

@@ -93,6 +93,7 @@ class HealthController extends Controller
         $this->view->programStatus = $programStatus;
         $toggleFeaturesForm = new ToggleInstanceFeaturesCommandForm();
         $toggleFeaturesForm
+            ->setBackend($this->backend)
             ->setStatus($programStatus)
             ->load($programStatus)
             ->handleRequest();

modules/monitoring/application/forms/Command/Instance/ToggleInstanceFeaturesCommandForm.php

@@ -138,7 +138,7 @@ class ToggleInstanceFeaturesCommandForm extends CommandForm
             )
         );
 
-        if (! preg_match('~^v2\.\d+\.\d+.*$~', $this->status->program_version)) {
+        if (! $this->getBackend()->isIcinga2($this->status->program_version)) {
             $this->addElement(
                 'checkbox',
                 ToggleInstanceFeatureCommand::FEATURE_HOST_OBSESSING,