Have NativeQueryEditor use react-ace

Our `NativeQueryEditor` currently uses a global, vanilla-js implementation of Ace.

Ace is a code editor to be embedded in webpages.

There is a now a React wrapper for ace, which should simplify implementation in our codebase.

## Immediate Goal

Simplify implementation of `NativeQueryEditor`

## Secondary Goals

1. Evaluate feasibility of using react-ace for the custom expression editor.
2. Abstract the a purer editing component that can be reused for native queries, custom expressions and other uses.

The issue names NativeQueryEditor as the entry point; start by locating its current global vanilla-JS Ace integration and comparing it with react-ace. Evaluate the custom expression editor as a second use case, and treat the reuse goal as complete only when the stated feasibility and abstraction questions have clear outcomes.

Written by the indexing model from the issue text.