TASK: Filter sourceFields to make them unsettable via YAML

Author: daniellienert

Classes/Controller/SuggestController.php

@@ -121,7 +121,7 @@ protected function buildRequestForTerm(string $term, string $contextNodeIdentifi
             $contentContext = $this->createContentContext('live', $dimensionCombination ? json_decode($dimensionCombination, true) : []);
             $contextNode = $contentContext->getNodeByIdentifier($contextNodeIdentifier);
 
-            $sourceFields = $this->searchAsYouTypeSettings['suggestions']['sourceFields'] ?? ['neos_path'];
+            $sourceFields = array_filter($this->searchAsYouTypeSettings['suggestions']['sourceFields'] ?? ['neos_path']);
 
             /** @var ElasticSearchQueryBuilder $query */
             $query = $this->elasticSearchQueryBuilder