Redesign the edit text format interface

Issue Summary

Why can't users just edit and rearrange the filters for a format on one page? From http://www.drupalusability.org/node/27 we discovered that users have to click two levels of edit and there's a separate rearrange interface as well. This is confusing and not usable at all.

The solution I propse is:
A draggable filter interface, similar to the blocks interface. There is an 'enabled filters' section and a 'disabled' filters section. To enable a filter, a users can just drag the filter up to the enabled section and also rearrange it in position right away. To configure a filter, the draggable part has a 'configure' link on it, which drops down the options from the draggable part.

That probably wasn't very clear, so let me try and hack up a screenshot first so we can decided if it is worthy solution.