Anichart detail hider by Firefox user 13068532

Adds small interface to upper right corner of page when visiting the page <a rel="nofollow" href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/308da2e0fd4ebf31482baa0d4c94a16a23c6f05a4856feb13581add7e1d946b3/http%3A//anichart.net">anichart.net</a>. Clicking a button will hide the written details of the shows in the page, and another restores them.