Pushing to the navigation stack includes the html element wherein
the palette was rendered so that when going back to it, it is rendered
in the same place.  This allows different areas of the adaptive-palette
to navigate to different palettes.

This move is to match the move of all of the `src` files to the `client`
folder as part of the express server work (`feat/setup-server-src`).

- Not needed: aria-controls was used for the id of the element
  wherein to render the go-back palette, but that id is now stored
  with the go-back palette,
- Confusing: if the code continued to use aria-controls, then its
  value would change depending on which go-back render element is
  currently relevant. But, changing that value is likely confusing
  to an AT user.

…gies