CoL including the lift of the fuselage

[CaptainTurbomuffin]

With the new aerodynamics, the fuselage itself also applies lift, wich is not displayed in the editor. When building a plane with small wings, the lift of the fuselage is major compared to the lift of the wings. However, only the lift applied by the wings is displayed in the Center Of Lift, wich may cause troubles with the plane. The lift applied by wings and Mk.2 parts is displayed. The lift applied by everithyng else should be displayed too.