Bug: infinite SEO uses multisite role as default

Bug report.

Infinite SEO 1.7 now imposes a multisite role (super admin) as the default for access to metaboxes. You can see the configuration here:

The issue is that if multisite isn't installed/activated (iow, a standard WP setup), the metaboxes will not display or even have the option of displaying in posts/pages until you change the options on the URL above.

The plugin behavior should be fixed to use "site admin" as the default *unless* multisite is active.