Switch windows if a PDF is already open

It’s great that “click to open PDF” will switch focus to a different tab if the PDF is already open, but it does not switch windows. If the paper is in a different window and I click the button, it appears that nothing happens. I finally figured out that if I go to that window, it switched to that tab. Is changing window focus implementable? Thanks!

(Chromebook Pixel 2, latest dev version)