Give warnings in the backend of custom layout update / custom layout configurations are found

[peterjaap]

SELECT * FROM catalog_category_entity_varchar WHERE attribute_id = (SELECT attribute_id FROM eav_attribute WHERE entity_type_id = 3 AND attribute_code = 'page_layout') AND value IS NOT NULL;
SELECT * FROM catalog_category_entity_text WHERE attribute_id = (SELECT attribute_id FROM eav_attribute WHERE entity_type_id = 3 AND attribute_code = 'custom_layout_update') AND value IS NOT NULL;
SELECT * FROM catalog_product_entity_varchar WHERE attribute_id = (SELECT attribute_id FROM eav_attribute WHERE entity_type_id = 4 AND attribute_code = 'page_layout') AND value IS NOT NULL;
SELECT * FROM catalog_category_entity_text WHERE attribute_id = (SELECT attribute_id FROM eav_attribute WHERE entity_type_id = 4 AND attribute_code = 'custom_layout_update') AND value IS NOT NULL;