R1:81134d7e7d54

After reloading transactions for the recipient while building transaction mail, put them in the input order

Summary:
Ref T13303. In D20525 I fixed an issue where transaction rendering could use cached values with the wrong viewer by reloading transactions.

However, reloading transactions may also reorder them as a side effect, since `withPHIDs(...)` does not imply an order. This can make transaction rendering order in mail wrong/inconsistent.

Instead, reorder the transactions before continuing so mail…