default base field preview option value be layoutElement:UID

Author: i-just

src/fieldlayoutelements/BaseField.php

@@ -206,7 +206,7 @@ public function getPreviewOptions(): ?array
         return [
             [
                 'label' => $this->selectorLabel() ?? $this->attribute(),
-                'value' => $this->attribute(),
+                'value' => 'layoutElement:{uid}',
             ],
         ];
     }