Ember

Describe the bug
It's impossible to disable control if it is inferred from component props.

To Reproduce
https://github.com/pahan35/storybook-repro/tree/cant-disable-control-for-inferred

System

Environment Info:

System:
OS: macOS 11.6
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Binaries:
Node: 14.17.6 - /usr/local/opt/node@14/b

Issue Summary

I have Ghost Self-hosted.

When I try to import my subscribers from Substack, it shows this error as shown in the image.

I tried searching everywhere but no solution. I also tried to manually create the Members folder on the server but still no luck.
![CleanShot 2021-08-07 at 20 42 50@2x](https://user-images.githubusercontent.com/5517129/128604907-9d7cab8d-0d6b-4cbb

By default ember-cli updates a number of the "app trees" to be from tests/dummy when developing an addon locally. We do this for app, styles, templates, public, and tests trees (handled inside lib/broccoli/ember-addon.js).

Unfortunately, we do not forward the apps vendor tree to tests/dummy/. This means that our addon's treeForVendor is called, but then subsequently clobbered by the "apps

Is your feature request related to a problem? Please describe.
I understand Ember Inspector is for the development and Debugging phase. And I am of the opinion that, having access to the private (by convention, underscore prefixed) fields/property is a very useful feature when hunting for problems like why a certain computed property based on other field and property have an unexpected value.

It got lost early in some v4 release candidate. Original content could be found here: https://github.com/kaliber5/ember-bootstrap/blob/b711738bba95fd9523e573e5e314f4cf7257f93f/addon/components/base/bs-button.js#L183-L191 It could be used as a starter.

Reported by @rwwagner90 here: kaliber5/ember-bootstrap#1110 (comment)