Show income from treaties

[Xyquas]

When I look at my financial stats at the galaxy map, I see gross and net income as well as maintenance cost of colonies and ships plus tributes. What I don't see is the amount that my trade and tourism treaties make up. So I suggest showing two new lines:
- Income from trade treaties
- Income from tourism treaties

This way I can determine how profitable a relationship to a specific race is. This becomes valuable information when I have to decide which of two races I like to continue due to an conflict between these races.

[keller]

This would be a nice addition.