Keybinding fix for plane cover

A typo in the keybinding that controls the cover was set to one of the
default keys - resulting in the spreader being activated when the plane
was opened or closed
Revert "Keybinding fix for plane cover"

This reverts commit 1f62b8e2ac61bd157a5aa30a546f5ccc802b067f.
Keybinding fix for cover