FB18553664 - Hide Safari web app extension in Safari Extension Settings

[lapcat]

I have a Safari app extension on macOS. Since Safari web apps do not support Safari app extensions, I had to create a separate Safari web extension for Safari web apps. However, both the app extension and the web extension appear in Safari, even though the latter is meant only for web apps. This is confusing to users. I would like the ability to hide the web extension from Safari Extensions Settings, so that only the app extension appears there.

Two possibilities would be a special Info.plist key or a special manifest.json key for the web extension.