A-EFIS black & white

Nov 23, 2019

v3.31.1: Fixes bug causing crashes when the first waypoint is selected and the user tries to delete it.
v3.31: Solves bug with color version being automatically activated on some android phones. Solves bug with application crashing when adding a custom waypoint on some devices. Adds knots as units for vertical speed. Adds external device indicator on main screen when connected to an external device. Minor bug fixes and interface enhancements.