Properly set the Photon page action's title and icon.
Properly set the Photon page action's title and icon.

Bug 1395387 changed the Photon page action API so that `title`
and `iconURL` are no longer properties but methods, setTitle()
and setIconURL().  We need to update our consumer.  Right now,
setting these properties isn't doing anything at all.

mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/pageshot,mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/pageshot