Blueprint - allow editing / replacing Blueprint#595

During the time i have played the game (even over different versions) I thought it might be helpful to be able to change a blueprint in the library, not the name (this is already possible) but the blueprint itself.
This could be neccesary due to unlocking new buildings and features or even due to changes in the core game (to name one: packers)

Agreed. A ‘save over exiting’ type option.

We have two ways to do this now. I think it might be complete.