Disambiguate select when multiple items qualify

When attempting to select an item that's "behind" (from the camera perspective) something else, allow the first select to choose the item that's closest to the camera, then subsequently deeper items (further from the camera). If I built a length of 1 conveyor belt at level 1 joining two buildings and a pipe at level 2 (direction of the pipe is irrelevant), looking straight down, I can't easily select the belt at all. This applies to any time when the camera is looking at multiple items within a particular visual block.

Yes, perhaps a pop up menu, much like the one from the upgrade tool.