Feature Request: Add icon to show mapped bodies in Navigation panel

[AphelionConnection]

In the navigation view with the text view of the system, where each planet has icons displaying atmosphere, life, high value body etc, it would be very useful to be able to tell at a glance which bodies have already been mapped. This is already possible to view by clicking on individual planets, but it would be great to be able to see an overview of the whole system.

[KingGLEB]

I'm joining you. It would be a very useful feature for the discoverers. It would be very useful to see if the planet has been scanned and landed on it.