"Aliens remaining on map" counter [For limited mapsizes only]

Please add a new option to view how many aliens are remaining on the map (spawners and worms).

Reasoning: I play on a limited mapsize and I have two viable objectives for each of my playthroughs:

1. Build a spaceship (SpaceX Mod Lite)
2. Wipe out all aliens

Currently I can only track the latter by guessing if I did actually just defeat the last alien spawner on the map, or is there another spawner somewhere that I overlooked by accident.

It would be greatly helpful to me if I could just look up a GUI tracker to see how many aliens are left on the map. It would give me a sense of relief and confidence that I got the last alien for sure.