Source Organization field should be an autocomplete to prevent duplicates and aid search

[eby]

Feature request from @vielmetti

Old system had an autocomplete on the source organization field. It also had a couple common ones.

It my test of the old autocomplete it was still showing quite a few slight spelling differences so obviously isn't fool proof but would aid in some of the browsing if most things are uniform.

[steiza]

This should be fixed by a477831. It adds auto-complete to the add doc interface and also the edit doc interface (to help with cleanup / de-duplication).

Still working on the other requests. : )