Describe the bug
I notice that when I delete an edge or a node there is still a corresponding react element in react extension's Components view (or whatever you call it). It seems that you remove dom elements but you never call ReactDOM.unmountComponentAtNode. Is it on purpose? Isn't pretty much a memory leak? I could be wrong, so please explain why it's done this way.

To Reproduce
Steps to reproduce the behavior:

1. Remove a node or an edge
2. Look into react extension's Component sview
3. Notice that there are still components "alive"

Expected behavior
They should be removed, I guess?

Screenshots

Notice the NaNpx (an edge was removed, but the React component still exists?)

Desktop (please complete the following information):

• OS: [e.g. iOS] macOs
• Browser [e.g. chrome, safari] firefox/chrome
• Version [e.g. 22] newest

Additional context
version 8.0.0-beta.6
node v14.17.0