Courseplay for FS19 v6.02.00045

We were using the presence of the isLeft attribute of wheels to figure out if the wheel is a real wheel of an implement or just any support wheel. We need the real wheels to determine the turning radius and the distance between the attacher joint and the wheels for turn calculation.

Unfortunately the absence of isLeft isn't a reliable indicator of dummy wheels anymore, so some implements, especially those with wheels on the folding parts behave differently depending on their fold state when starting the CP driver. This is possible a Giants bug.

Use hasTireTracks now instead of isLeft to find real wheels.