Allow users to close a schema treeview node in the data manager

[bertyhell]

Is your proposal related to a problem?

When exploring the schemas and tables in the data manager view, you can open a schema and see the tables that are below. But you cannot close it again. This is counter intuitive since most treeviews allow you to expand and collapse a treeview node

Describe the solution you'd like

When a user clicks a treeview node that is already open, it should collapse again.

Describe alternatives you've considered

none

[manasag]

Thanks much @bertyhell for opening the PR for the fix. It's added to our backlog for review.

[bertyhell]

The PR to fix this: https://github.com/hasura/graphql-engine/pull/10321