checklist upgrade

Made an attempt of making the site filter on the site.html look a little more appealing and consistent with other filters on the website.
This looks like it's in the right place. Notice that the way you're binding the click event differs from the way the click event is bound on .clickableRow directly above. These are both valid ways to bind click events and usually you'll want to follow the pattern if it's already set.

So in this case, you'd do $('.check_filter').click(function() { ... })

But that's ok since it doesn't make a functional difference here.