Alishan Ladhani

Browser needs some enhancements

1

- Use the new mechanize (don't require progress_bar is mechanize version > 1.0) - Cache form submits - Show page.body in browser

feat: add Letterboxd link to ExternalLinkBlock for movies

1

#### Description This PR adds a [Letterboxd](https://letterboxd.com/) link to the `ExternalLinkBlock` for movies. The link uses a TMDb ID, as described in https://letterboxd.com/about/film-data/. Example link: https://letterboxd.com/tmdb/945729. The logo SVG is...