* Track user actions for creating, updating, and deleting and index lifecycle policy.
* Track user actions for attaching an index, attaching an index template, and detaching an index.
* Track app load action.
* Track usage of cold phase, warm phase, set priority, and freeze index.
* Track retry step user action.
* Track clicks on the policy name to edit it.
* Refactor constants to be in root of public.
* Add support to user actions API for comma-delimited action types.
* Refactor rollups trackUserRequest to be easier to understand.
* Use underscores instead of dashes for user action app names.
* Switch from componentWillMount to componentDidMount/useEffect.
- Standardize use of HashRouter within app.js to avoid calling useEffect when leaving the app.