Change “hide/show boosts from …” menu to be hidden when the account is muted (#13748)

Otherwise, it may mislead users into believing this setting is an
exception to the muting behavior.

Fixes #13744

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

@@ -192,11 +192,13 @@ class Header extends ImmutablePureComponent {
       menu.push({ text: intl.formatMessage(messages.domain_blocks), to: '/domain_blocks' });
     } else {
       if (account.getIn(['relationship', 'following'])) {
+        if (!account.getIn(['relationship', 'muting'])) {
           if (account.getIn(['relationship', 'showing_reblogs'])) {
             menu.push({ text: intl.formatMessage(messages.hideReblogs, { name: account.get('username') }), action: this.props.onReblogToggle });
           } else {
             menu.push({ text: intl.formatMessage(messages.showReblogs, { name: account.get('username') }), action: this.props.onReblogToggle });
           }
+        }
 
         menu.push({ text: intl.formatMessage(account.getIn(['relationship', 'endorsed']) ? messages.unendorse : messages.endorse), action: this.props.onEndorseToggle });
         menu.push({ text: intl.formatMessage(messages.add_or_remove_from_list), action: this.props.onAddToList });