Sensible controls, behaviour

testAircraft:
-now behaves very much like a Boeing747-400
+altitudes are capped, since 11km makes a bad cruising altitude for the
game
+not checked turn rate or accelerations

-ATC bug fixed in eventHandover that caused crashing

RadialMenu:
-calculations now use doubles instead of ints to remove significant
rounding errors
+for sizes not divisors of 360
-will no longer draw backgrounds over text if it spills outside its area
-supports spacers
+will not draw background if both label and image are null
-tracks mouse movement within the component to highlight current button
+so long as the mouse has not left the component
+(bearing menu now behaves much more nicely)
-removed console spam

MouseInput:
-bearing interval reduced
-speed menu is now useful
-altitude menu is now useful