Ignore AbortError when cancelled sharing (#6978)

`navigator.share()` rejects Promise if user cancelled sharing, and it may
print it as an error on JavaScript console.

This patch ignores it and prints other errors on the console.

app/javascript/mastodon/components/status_action_bar.js

@@ -67,6 +67,8 @@ export default class StatusActionBar extends ImmutablePureComponent {
     navigator.share({
       text: this.props.status.get('search_index'),
       url: this.props.status.get('url'),
+    }).catch((e) => {
+      if (e.name !== 'AbortError') console.error(e);
     });
   }