Make the schema comparison show up

If I remember correctly, this is a D6-ism - which this patch fixes.

There's an added change that I hope you're OK with (but I can remove it if you want): the Adminimal theme (which rules the pack with 75.000 installs for D7) assumes the CSS id #edit-cancel is the cancel button - or can at least be given an orange background. This module's form definition assigned #edit-cancel to the fieldset and #edit-cancel--2 to the button. It's arguable which party 'should' fix this, but... let's.

Before

After

...oh, and there's a duplicate bullet point in the output on Adminimal. That's because there's an item list (div class=item-list -> ul -> li) inside a 'dd' element. That's an Adminimal issue; Core themes are fine.