P0-B7: Part 1374: Debugging, Improvements

I have fixed a large number of additional issues with the project, focusing mostly on the main story.

There were issues with placing and deleting story items, and placing items persistently, etc.

There were also issues with navigation over large distances and high speeds, etc.

There were aa myriad of minor issues and improvement that I also made, which have contributed to making the project much more stable, but still more testing is needed.