Stock Market Addon | Control your economy

Added

1. When a market crashes, the notification is also added to the news feed
2. Added notification for if you can't afford to purchase advertisement
3. Made it so it instantly updates investment group UI balance when you purchase advertisement (you would have to re-enter the menu to see updated balance)

Fixes

1. Fixed when you press "Purchase advertisement" it will display your advertisement on the cycle after next news event.
2. Fixed stock events not showing in news feed

Changed

1. The chance that a market event will crash or boom the market has been changed from 70/30 in bias to crash, to now 50/50