Default event name badge layout created for each multisite instance

I discovered when doing some work with multisites recently that the Annual Conference Hanging Badge (Avery 5395) record is created (and marked as default) each time a multisite instance is added.

I don't think there's a need for these to be domain-specific (the schema doesn't currently support it anyway). A quick and dirty fix is run the insert only if @domainID is equal to 1. Here's an example using the case operator.

I can supply a PR for this unless someone has a better idea.