[regression] comment numbers are not wrapped into headings

Previously, when drupal.org used Drupal 6, you could find the comment number before each comment to an issue in the issue queue wrapped into an h3 heading. Now, after the drupal.org upgrade to Drupal 7, you can still find the comment number before each comment to an issue in the issue queue, but it is no longer wrapped into an h3 heading.

This is a critical accessibility issue for screen reader users: in fact, tat heading was the only way to quickly jump back and forth between different comments. Now, since the heading "has gone away" there's no way for a screen reader user to jump quickly from a comment to another. So, this issue degrades significantly the user experience of any blind Drupal contributor. Also, this is a regression.