This is the same permission computation as in `content.xsl` at https://github.com/Jasig/uPortal/pull/218/files#r9404599 .  Might (or might not) be evidence that this user-may-and-can-configure-this-portlet-ness wants to be computed prior to XSLT and included in the model for re-use whereever the XSLT needs to know this about a portlet.