Homestyx hydra

R1:8c7f114b4d90

Fix an issue where "Export Data" could fail if a user had a nonempty custom policy preference

Summary:
The "Export Data" workflow incorrectly uses the "Policy Favorites" setting to choose a default export format. This is just a copy/paste error; the correct setting exists and is unused.

If the setting value is an array (as the "Policy Favorites" value often is), we try to use it as an array index. This generates a runtime exception after D21044.

```
[2020-06-16 06:32:12] EXCEPTION: (RuntimeException)…
Repository: R1 hydra
Commit Date: Jun 16 2020