Make more apparent that an account is blocked or muted (fixes #6544) (#6627)

* Add button to unblock blocked accounts from their profile

* Add “Blocked” badge in place of “Follows you” when the user is blocked

* Add “Muted” badge (below “follows you” badge)

app/javascript/mastodon/features/account_timeline/components/header.js

@@ -82,6 +82,7 @@ export default class Header extends ImmutablePureComponent {
         <InnerHeader
           account={account}
           onFollow={this.handleFollow}
+          onBlock={this.handleBlock}
         />
 
         <ActionBar