Place the stateful-plugins-with-widget-factory.md page under the Widget category.

[b01]

I knew this existed so the first place I looked was under Widget, but I could not find it there. Because it's under the Plugins menu category. Maybe it can be left under plugins, but a link be added to the Widget category.

[b01]

Nevermind, This is under the Widget menu, but is called "How to use the Widget Factory."