Whoa Alex, how can you be so fast with fixing everything
While you are looking into this feature: don't you also think it would be useful if the bookmark corresponding to the current page would be centered vertically in the bookmark pane -- once it's out of view and the bookmark pane has to be scrolled anyway?
This way, you could instantly see the surrounding bookmarks in both
directions again. This would be similar as the "Find" feature in all major browsers nowadays that centers any next found occurrence vertically on the page, surrounded by the context up and down (try by pressing Ctrl+F on this page, type "highlight" into the browser search box, and then press F3 a couple of times).
Thanks for considering, if applicable!
Keep up the great work