feature[network-plugin]: GraphQL support

[pavelperc]

Is your feature request related to a problem? Please describe.
Hello. Our team uses GraphQL apis together with REST. And all graphql requests have the same api url. So it is very hard to guess which query corresponds with each api call:

Also GraphQL server responses with 200 code even if the request is failed. So it is impossible to guess which request was failed.

Describe the solution you'd like
Suggest to add graphql support for network plugin - distinguish graphql requests and show query name in api calls list:

Also responses with graphql errors are colored red instead of green.

Tried to implement it here: #327