Allow use of arrows keys in mission control building

[Kialar]

Hi there.

As contracting just for sake of contracting I did try to scroll through the available contract list in mission control by using the arrow keys "up" and "down".

Obviously that didn't work.

So I would suggest to implement such a feature in a way, that if a given contract is highlighted, one may use the arrow keys instead of a mouse click for viewing the details of the contracts above and below. (of course that means not to disable mouse clicking ).

-Kia