A link "(r)" is added in the two tabs "Issues" and "PR'. It is used as a single click shortcut to the corresponding listing sorted by "Recently updated".

And in the GitHub page header.

On the page displaying all your Pull requests, or Issues, a new category ("Commenter") now appears.
Clicking this button will display all the issues/pr in which you made a comment. They might not appear in the other categories.

For more userscripts, styles, extensions, tips, ..., visit my programming page.