Fix conpherence name clearing bug

Summary: pre-patch, when you upload a photo if the conphernece has a name it gets cleared. Post patch this no longer happens. Patch also makes the case where you delete the conpherence name have more sensical text.

Test Plan: named a conpherence, uploaded an image, verified the name stayed the same. Deleted a conpherence name by changing the text to nothing and verified it work correctly, including having good transaction text.

Reviewers: epriestley, chad

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2399

Differential Revision: https://secure.phabricator.com/D4852