Some fixes for key issues on the 0.2 alpha branch:

• Fixed a 0.2.8 change causing inputs to not be read during the Unity diagnostics prompt, causing a softlock on fresh installs. (More)
• Fixed plate structures becoming bugged when setting the thicken mode of a face pointing perfectly downward to 'horizontal'. (More)
• Fixed powertrain objects being selectable through the tracks. (More)