Make navigating HDR projects easier

This is a usability feature request. On the Control Points tab there are two arrow buttons to switch to the next/previous image pair. It would be great if those could be configured (or extra buttons added) to switch to the next/previous stack at the same offset within the stack. For example, if I'm currently looking at image 3 in stacks 2 (left pane) and 5 (right pane), pressing the "next" button would then show image 3 in stacks 4 (left pane) and 6 (right pane).

On a related note, it would be awesome if the image dropdown lists on the Control Points tab would show stacks. For example, alternate background colours for stacks (so all images in odd stacks have a white background, and all images in even stacks have a light grey background). The same could be applied to the filename list in the Masks and Photos tabs. This would make navigating large HDR projects much easier.