[PHP-WEBMASTER] [web-php] PR #1258: Sticky thead

[vrana]

Pull Request: https://github.com/php/web-php/pull/1258
Author: vrana

This is useful with longer tables.

![image](https://github.com/user-attachments/assets/25454f5d-c213-4bd5-9ae3-fc1477b2e9cd)