Default Header to Small Style

Defaults the KSL Header to small. We are currently having problems with
JavaScript not loading correctly on mobile devices and so in these cases
the header stays at the large size. The large size is very unsuable  on
mobile devices and looks ugly.

In contrast, the small size works great on mobile and good enough on
desktop. By defaulting to small, the site looks better when the
JavaScript fails and this customers aren't as concerned.

Updates header to default to the small size. This is a small fix to
hold people over until we fix the larger problem.
Merge pull request #11 from deseretdigital-ui/defaultSmallHeader

Default Header to Small Style