update kirby to v5 and add refresh cache panel view button

public/kirby/config/fields/object.php

@@ -91,13 +91,13 @@ return [
 				$name  = array_key_first($errors);
 				$error = $errors[$name];
 
-				throw new InvalidArgumentException([
-					'key'  => 'object.validation',
-					'data' => [
+				throw new InvalidArgumentException(
+					key: 'object.validation',
+					data: [
 						'label'   => $error['label'] ?? $name,
 						'message' => implode("\n", $error['message'])
 					]
-				]);
+				);
 			}
 		}
 	]