FIX Include default_sort in sortChildren method

code/GraphQL/Resolvers/FolderTypeResolver.php

@@ -142,6 +142,21 @@ public static function sortChildren(array $context): Closure
             $classNameField = "(CASE WHEN \"ClassName\"={$className} THEN 1 ELSE 0 END)";
             $sortArgs = array_merge([$classNameField => 'DESC'], $sortArgs);
 
+            // Partial support for File::$default_sort
+            // File::$default_sort = '"Name"' - which is the default, is supported here
+            // Does not support "Table"."Field" syntax or arrays
+            $defaultSort = File::config()->get('default_sort');
+            if (is_string($defaultSort) &&
+                preg_match('#^"?([a-zA-Z0-9_]+)"?( asc| desc| ASC| DESC|)$#', $defaultSort, $matches)
+            ) {
+                $field = $matches[1];
+                $dir = strtoupper($matches[2]) ?: 'ASC';
+                if (!array_key_exists($field, $sortArgs)) {
+                    // add default sort to the end of the array so that it has lowest priority
+                    $sortArgs = array_merge($sortArgs, [$field => $dir]);
+                }
+            }
+
             $sort = [];
             foreach ($sortArgs as $field => $dir) {
                 if ($field == $classNameField) {