I tried holding 'shift' and 'z' over these parts of the UI:
But it did not show any tooltip/pop-up. It is mostly self-explanatory, though, especially for new players, it might be nice. Might not be worth implementing if it is bothersome to add a tooltip to those UI elements, however.
Is there any saving or loading at the moment? When I select a crew member on the left-most side of the screen, and the crew member is not the top one, the crew member jumps up the list. Once the crew member is at the top of the list, I can click the crew symbol again to see the inventory for that crew member. That feels a bit annoying, at least so far.