Separate the opt-in/opt-out actions into their own tab/graph

Change-Id: Ie24e4b22e35298a065e30d995e669cefdb241ccd
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/675
Add opt-out and opt-in totals to graph

(change commit message)

Change-Id: If730b40a78b3fb60db1a5dfadefbcb21e3bff547
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/675
Merge changes If730b40a,Ie24e4b22

* changes:
  Add opt-out and opt-in totals to graph
  Separate the opt-in/opt-out actions into their own tab/graph