Fix logout doesn't reset resource registration

[fzaninotto]

Closes #7527 and #7586

• Unregister resource definitions when resources change
• Cover with unit tests

[WiXSL]

I can still reproduce the bug described in #7527 locally, in the simple project. Just copy the index.tsx code of the proposed sandbox to the simple project's index.tsx

[fzaninotto]

After thinking it through, I believe we should unregister resources when unmounting <Resource> rather than on logout. Because <Admin> accepts a function as child, the resources can vary according to external state.

[slax57]

I added some tests to cover this.
However, I thought the last one would fail (justifying the need to unregister resources at unmount), but actually it doesn't.
I couldn't figure out why yet.
I think it would be better to understand this fully, and to be sure it will work in any cases before considering this issue fixed. If it's not the case, then I still need to implement François' suggestion + update my test case to reflect this.

[fzaninotto]

I made sure the last test doesn't pass if we don't unregister the resource. The PR is ready for review.

[fzaninotto]

I can still reproduce the bug described in #7527 locally, in the simple project. Just copy the index.tsx code of the proposed sandbox to the simple project's index.tsx

I've tested it and the ready screen only shows up briefly. I've updated the docs and code to prevent it.

[djhi]

🔥