Revert "Temporarily removed ref tag to get the page validated. (Was a…

…lso pointing at a rather semi-finished looking page)"

This was breaking the tag autocomplete code, which depends on this value.

This reverts commit 5e8d925.

modules/tag/views/tag_block.html.php

@@ -22,7 +22,7 @@
     });
   });
 </script>
-<div id="g-tag-cloud">
+<div id="g-tag-cloud" ref="<?= url::site("tags") ?>">
   <?= $cloud ?>
 </div>
 <?= $form ?>