Use "Dear donor" when we don't have first or last names

Change-Id: I2b1aee22728c8c2afe007950106859cdd9f658bb
utm_campaign for Mediander

Change-Id: Ib1d693e848a79bfe70932a5f046eb0fd258a8257
Merge "Use "Dear donor" when we don't have first or last names"