"Overwrite" Blueprint type (or Ctrl-left click)

[RiverRob]

Create a blueprint (or add Ctrl-Left click) that works like a regular blueprint when shift is held except the following -
Structures in the way are removed, not worked around. And all extra items within the dimensions of the blueprint are removed.
Structures that would just be replaced are left alone and in place (saves some time, why remove it just to put it back down)

Shift place, leave what's already there. Ctrl place, remove what's already there.
So kind of like Red, Green, and Blue prints all in one.

[RiverRob]

Thank you for adding this to Space Age!