Don't show doc status on edit form

Document linking is now managed on the show page
tweak class names on linker links
Allow announcement linked documents to be changed

This allows a linked document to be changed after the fact so that
mistakes can be corrected.
Do not allow change notes on minor changes

If the change merely increases the precision of the release date, then
a change note is not required and should be rejected.
Toggle precision when release date is confirmed

If a release date is marked as confirmed, then we should fix the
precision to exact.
Rename javascript assets folder for consistency