Update the extension to reflect the changes in Chess.com's HTML

Accommodate the new changes by Chess.com in the pages HTML.
The extension now adds the Lichess analysis button also to the popup that appears once a game ends.
The button is now always placed next to the "Game Review" button for consistency with Chess.com UI.

Minor updates following chess.com rename of some classes in the analysis page

chess.com changed element names, so did I