[1.50] Venture UI crash looses progress + other bugs

[Alci]

- venture finished, opened venture UI, tried to switch to second tab, got CTD (first crash ever so soon after game start), loading just before that moment, and no mission at all
- missions never brough any exceptional mod rewards even when they promise some
- when I click "click to see rewards" nothing happen (no list of rewards); if I then click "venture in progress" it just changes to "completed"; if I switch tabs to first and back to second it's completely empty, never show anything again

[CBJ]

This should hopefully be fixed in the next update.