Update access control page

Fix bug

lib/common/string.dart

@@ -2,4 +2,10 @@ extension StringExtension on String {
   bool get isUrl {
     return RegExp(r'^(http|https|ftp)://').hasMatch(this);
   }
+
+  int compareToLower(String other) {
+    return toLowerCase().compareTo(
+      other.toLowerCase(),
+    );
+  }
 }