Great job! I found the following bug:

Create an app feature.

Than go to global settings and change the left thumb selector to show/hide desktop. Now go the app feature. The thumb selector will not be show/hide desktop (expected), however, now try to add it to be show/hide desktop. It won't work. Instead you'll have to delete the app. And re-add the app. Now you'll be able to search for this option.

It seems not all options are viewable on app settings.