Add rel="nofollow" in the order by list

[balai]

According to Google, pages with different url parameters but the same content, are considered duplicate pages and can cause indexing issues or keywords cannibalization.
https://support.google.com/webmasters/answer/6080548?hl=en

It is advisable to use nofollow for links that create pages with the same content.

[jenkinhill]

The use of nofollow is now of less "SEO value" than it used to be. See https://www.searchenginejournal.com/google-nofollow-hints-seo/325363

The use of canonical URLs as used in VM is, IMHO, more valuable.

[balai]

Jenkinhill the addition of the new attributes does not deprecate the nofollow. Also still seems the most appropriate for internal links.
Anyway this needs to be handled.