Implemented Comments pagination is now anchored to the comments section of the showcase item.

As per title, thanks to an update of the xf pagenav helper used for pagination, its now possible to add anchors for pagination. Comes in handy for addons like Showcase where the Comments Section is below the Item, so that when navigating between comments pages, it now anchors to the comments section instead of going to the top of the showcase item page and having to scroll down to the comments section each time you go to a new comments page.

(this image is from AMS, but it works the same...)