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This is a partly revert of 8e8142cb as the car was not shown
correctly after that change (I have no idea why).

Having the needle slightly transparent is causing sorting issues and
therefore causing the needles to be obfuscated once they reach a certain
point.

The existing values were causing the needed to jump because the
root values couldn't be calculated. This is a bug in Qt3D, but
we can't fix that before the next patch release.

Support for changing speed units added. Re-organized for Studio 1.1 API.
Note: 1.1 API not taken into use yet in this commit.

Note: Disable shadows for Pixel C in mainPresentation.uip, they seem
to cause instability.

Sub-presentation QML stream was missing, added it back.