[Userscript] WaniKani Open Framework Additional Filters (Recent Lessons, Leech Training, Related Items, and more)

I’ve been using this script intensively for my self study quiz to help me squashing my leeches. It’s been troublesome to always use forum search just to get back to this thread. I saved this thread link in my Apple Notes.

I’ve just put this thread link to The New and Improved List of API and Third Party Apps under Dashboard.