A browser of systems. Similar to the expansion planner.
It would be nice to see at a glance which system produces how much minerals/etc., both in potential and realized yield (stations built or not yet). When searching for the best systems for habitats (to get lots of whatever type of district I currently need most), it's quite a pain to manually hover over each system from map view, and mentally keep track of what the current best was and where that was again.