This woudl be a wonderful feature and would save me personally a ton of clicking. Soon after colonizing I usually launch one satelite in orbit with sensors on it so that I can watch my adjecent sectors. But then everytime I want to select the planet I have to click the sector and then click the planet
This always bugged me in SE:IV, but it isn't so bad now for some reason. It would be nice to have a toggleable option to auto-select a colonized planet in a stack, however.