fix: account header toggle

[setchy]

Fix toggle bug introduce during groupBy feature

[bmulholland]

As a fix, this is fine, but as code to maintain: I find this hard to reason with. i.e. What do two chained ? operators do? :)

[setchy]

Do you find this easier to reason with?

{showAccountNotifications && (
  <>
    {groupByRepository
      ? Object.values(groupedNotifications).map((repoNotifications) => {
        const repoSlug = repoNotifications[0].repository.full_name;

        return (
          <RepositoryNotifications
			key={repoSlug}
			repoName={repoSlug}
			repoNotifications={repoNotifications}
		  />
		);
	  })
	: notifications.map((notification) => (
	  <NotificationRow
		key={notification.id}
		notification={notification}
	  />
	))}
  </>
)}

[setchy]

#1306