Planet Size, display!

Makes all celestial bodies (planets and stars) display their planet size. Ever wondered how big your Gas Giant is? Now you can see it. I never understood why it was hidden in the first place. Still works in 4. 0 --> Planet sizes can now be found under the 'management' tab of a planet, near where the terraform button would be found. _________________________________ This is achieved by giving all planet classes a terraform option into themselves (that can never be done). Because for some reason the game only displays planet sizes for celestial bodies that can be terraformed. Checksum edited (no Achievements)