Remember conveyor type in save.

Make the game remember the last type / size of conveyor / pipe you were building before saving. Kinda annoying after loading to remember to set them.
e.g.
1. Build a Pipe 3.
2. Save.
3. Load.
4. Build a building that needs a pipe,
5. Click the conveyor / Pipe construction menu, only the tab, not 'Pipe 3'.
6. Click the buildings pipe Input / output.
7. Have the game remember that before the save in step 2 above, you were using Pipe 3.