Added/changed:
- Lots of small optimizations (around 10-20% performance boost)
 - Added an option to disable supply source problems notification
 
Fixed:
- Incorrect family tree items in some cases of marrying a widow/widower
 - Wrongful notification related to supply source list (when set to 0)
 - Trade deal window didn’t return to previous pause state on close
 - Crash on bridge demolish in some cases
 - Cancelling vehicle orders messed up the game and led to crashes
 - Potentially fixed one of the causes for random crashes