* Adds query param for version no
This adds support for using a query parameter for selecting the version no
* Adds error handling to configuration request
Catch request exception in case fetching the configuration from the url fails, this can happen either if non existent version number is passed in or because of server issues.
* Makes version selection better
Covers a few common cases in which the version number can be specified.
Separates out search and direct linking, uses header ids for direct linking and `?search=term` for filtering configurations.
Once the app mounts the page is scrolled to the current header set in the url hash.
