Swapped tab order behavior

This puts the last tab first. This seemed more natural to _me_. Your mileage may vary.

The way I see it is that you might use `include` to bring in a bunch of common fieldsets like SEO fields, and then maybe put some page specific ones.
You'd probably want your page specific tab to display first. Similar to how EE has a 'Publish' tab by default then you can add more after.