If someone claims that they have never heard a more pedantic and petty objection, I can only say that they are absolutely right. I am not aware of any post that could surpass mine in this respect. But I dare to do so anyway:
Could the history buttons be placed at the beginning of the editors top bar to the left of the title? This corresponds to the standards (as you can see in the screenshot of the Finder) and would provide a little breathing space in view of the accumulating icons on the right-hand side of the top bar. That is an aesthetical request rather than a functional one.