instead of having to press space, plane can be selected by clicking on
it twice. Could not make the manual control always active as it would
conflict. Also drawing green circle around a plane only when bearing is
being changed is impossible/ very hard or buggy with current version of
the code. 

All planes always selectable achieved with keeping the transparency. New
keyboard controls supported for changing currently selected plane's
attributes - turning and changing altitude (W/up , S/down, A/left, D /
right)