Random Bug Fix

Hello everyone, long time no see. After taking a 2-month break from the game, I've decided to ease myself back into development by fixing some bugs and other things that were bugging me.

Fixes:

• The game no longer crashes when exiting the building menu
• Total cash is now displayed on the main screen
• "Research points" no longer appear behind the research nodes
• Removed "Placed buildings" window in buildings menu.
• Turned down the "event" aggressiveness.

Thanks, I will be back next update!