Stories 902, 903: Promoting pageactions (including editing) to stable

* Makes mf-api.js a startup module (now needed by history.js)
* Address FIXMES in lead photo upload and css

Also removing unused 'pagetitle' message

Change-Id: I7c1379874b115cf05ebd932b2f713d94062e08ee
Dependancy: I466d36e48dec1f798f38152c829a25eb80f8b67b
Enable anonymous photo upload cta by default

Hope there is no Selfie Apocalypse sequel

Change-Id: I0515977bf4bf58147b70a62b414f2c1518684aad
Merge changes I0515977b,I7c137987

* changes:
  Enable anonymous photo upload cta by default
  Stories 902, 903: Promoting pageactions (including editing) to stable