Fix admin edition filtering

For: https://www.pivotaltracker.com/story/show/46734111

There was a difference between not explicitly choosing a state and choosing "all" when hitting the admin edition index.  Made "all" be the default if no state param is provided.

Took the opportunity to also do the same for world_location_ids (default to "all") and tidy up UI so that all dropdowns (org, world location, etc) will pass on other options (state, type, etc).