When showing all apps, hides apps from the system category. Apps can still be accessed by selecting the system tools category. Basically made redundant for 3.8+ with the introduction of app folders, so it won't be updated.
Note: Binary files aren't shown on the web site. To see all files, please download the extension zipfile.
Looking Glass shows no attributes for AppSystem, and didn't show the get_menu_id method either, otherwise I might have figured that out. Thanks for the help.
All Apps, Not Settings