New Solar icons

[Hexan1]

Since labs and yards are prerequisite builds, it might be nice to have both showing in orbit on Solar Display, like the yard now is. Maybe also lab and yard variants to note level visually. One for yard 1, yard 2, lab 1, lab 2, etc. Would having a yard pulsate when building ships be too complex? Maybe display a lab icon on the orbit ribbon, rather than tacked to the planet? One assumes more prereq builds might develop as the game ideas progress.