The buttons share a common parent container, so they wrap as a single unit when there’s not enough space.
It looks like there’s some extra space around the new topic button here:
removing that might be enough to avoid it… wrapping these buttons is kind of a last resort, by default it only happens to admins on screens <355px wide, though factors like zoom levels and themes can affect this.
Maybe we could combine the admin and bulk select buttons here if they’re both present to avoid it 