Minimum required range for routes assigned to an aircraft

[JumboShrimp]

On the View Aircraft page,
In Assigned Routes section

Add the minimum required range for routes assigned to an aircraft.

This way, when moving schedules from one aircraft to another, player would know the required range, without having to open all the routes assigned to the aircraft.

Also, on the aircraft page, the system displays range of the aircraft (with currently assigned configuration)  It would be easy to compare the figures of current range and required range.