Don't display field notes on notes screen. closes #437. May have unexpected side effects. - deleting a note by clearing it down isn't sensible since those field notes really are notes.. which means the correct way to get rid is to delete them, which we can only currently do from the notes page. This commit effectively shuts off that apparently inconsistent route
Blanking out a comment now deletes the doc and the doc context that connected the note to the license. Uncomfortable with this area of the app, needs a revisit at some point. closes #437