When I take a lot of screenshots I usually open the latest one, then I keep browsing by using the arrow key until I find one that I don't like or a series of similar screenshots that I don't want. When doing so I may go to the next "page" without noticing, this is a problem because when I press ESC and return to the menu I am still in the first "page".

It would be great if the menu always followed the selected screenshot, so that when I press ESC the screenshot in question is always in the center of the screen and both the screenshots before/after are visible.

This one is definitely not easy to implement. I'll try but I cannot guarantee that this feature will come one day.