add ability to hide schemas

[bradzacher]

I'd love to be able to hide individual schemas (plus their connections) from the view.

The biggest use case is hiding the root query from the view. Right now we have 20 queryable entities, which means there's 20 (redundant) links on the UI from just that.

I'd like to hide it so that we can make it easier to understand.

[IvanGoncharov]

@bradzacher It's definitely something we need to think about. As a possible workaround, you can choose different root types for the graph, see this screenshot: