Add React missing useRef related constructs

[knewbury01]

adds the following:

• Add React Precallgraphstep useRef - this PreCallGraphStep is similar to the useState hook related one, but for the hook useRef.
• Add React DomValueSource that uses the ref from a dom. This may effect sources found for this query, and therefore the alerts found for that query.

[asgerf]

Waiting for another DCA run