* MTOM field now editable, for weight restricted runways. Will be reset on Flight Reset.
* Endurance calculated when setting fuel onboard. Based on a fuelburn @ 350 lb/h.
* Fuel Used can be set by either setting trip time in decimal hours or manually in main Fuel Used field. Calculated with fuelburn @ 350 lb/h for first hour, and 300 lb/h for the rest.
* Corrected bug where masses not checked for limits when adding special load.