v2.7.1344

Add support for Avery 5392 team badges

Adds support for Avery 5392 team badges, which is a page with 6 (2x3) labels.
Since we may add more templates in the future, this was the second format, and the
first with no gap between the labels, I took the time to support a few more
settings and made it generic enough that we should be able to easily support more
templates in the future.

Also cleaned up the admin page to use a table for all printouts.

Fixes #1263.