Use GraphQL more like GraphQL

[Edward-Upton]

GraphQL is meant to make querying simpler, with a set schema independently used by the client and server.

Currently, the approach is to create a new Query/Mutation every time we want to add some client/server functionality. What we should be doing instead is making more generic Queries/Mutations that make use of optional arguments. For example instead of having separate element data and permission updates, instead, create a updateElement that allows changing all attributes, with fully customizable options passed in.

A similar thing goes for queries. Instead of having a separate query for getting elements with/without children, we should just put this in one query with an optional argument to adjust the results.

On the caching side, we can choose how to perceive the changes dependent on the arguments.