Back to version 8.1.350 fixes

Flightpath trend and bearing displayed even when the aircraft is outside of the screen.

On the screenshot below, the aircraft is outside of the screen, and the flightpath trend (orange line with 10) and the bearing line (in grey, to the left of the flightpath trend) are still displayed.
redmine/Screenshot_2021-01-06_at_13.36.40.png