banning: Add an endpoint to add a note to banned users.
banning: Make banned list display note.
banning: Correct css on ban note.
reddit: Add missing length check on friend and banning note fields.
banning: Add the ability to set a note at ban time.
banning: Ensure TOO_LONG is actually validated for note.
reddit: Add note to banning and friend json.
banning: Clean up form after adding.