[ticket/12646] Add data-# attribute to breadcrumb links

https://tracker.phpbb.com/browse/PHPBB3-12646

PHPBB3-12646
Almost all MODs that have some kind of categories, use `navlinks`. This has nothing to do with forums in first place ;)
See e.g. https://github.com/nickvergessen/phpbb-ext-gallery/blob/develop-ascraeus/albums/display.php#L563