Buildmode Pause

While trying out new layouts for different productions, i always play in Gamepause so the trucks wont build something that i am not sure yet.
It would be nice to have a "buildpause" for example activated like the demolish tool, with that tool selected, everything you place is in a status that trucks don´t build. (Could be shown in a different blue than the standart). If the player like what he has build, he uses a different tool, like the existing "production pause" so he can choose wich buildings / Belts should be build.
THis option would let the player choose if gametime is running or not. It would improve gameplay because waiting time can be used.

Think thats done and in beta available