Need support for complete graphiql

[bl25322]

If my primary account that GraphiQL Notebook is associated with has feature flags for features like EventsToMetrics, these should be supported in the UI. If someone makes a call where feature flag is not supported, it should error.

If run a call like...
{

actor {
account(id: xxxxx) {
eventsToMetrics {
allRules {
rules {
accountId
description
enabled
id
name
nrql
}
}
}
}
}
}

If I pointed this query to an account that supports this, it just hangs.

[danielgolden]

I don't think we can reproduce this anymore :/