Bug 23648: The logged in link (class "loggedinusername") needs data-patroncategory

Bug 23648: The logged in link (class "loggedinusername") needs data-patroncategory

This patch adds a "data-categorycode" attribte to the logged in link in
the global header of the OPAC. This will allow access to the patron
category for use in customization and whatnot.

To test, apply the patch and log in to the OPAC. Use the browser's DOM
inspector tool to examine the logged-in user's name in the header. It
should have a "data-categorycode" attribute with the correct value.

Signed-off-by: Christopher Brannon <cbrannon@cdalibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>