Directional light model was made constant size, as it doesn't have
actual physical presence.
Spot light cone now shows the cone angle correctly and the length of
the cone is calculated so that 5% of the brightness reaches the
center of the cone bottom.
Area light rectangle matches the area of the light.
Point light mesh changed to three perpendicular circles.
Same formula for size of the circles used as for spotlight length.
All light types share a common brightness indicator arrow.
Task-number: QDS-2037
Change-Id: I534dbcda9cfa2a7768c2537868ba83818979b250
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Light gizmo icons and models are now colored based on the light color.
Image provider is used instead of simpler ColorOverlay component,
as ColorOverlay doesn't properly handle transparency when rendered
offscreen in puppet.
Change-Id: If6af915bca9bea2cb48ac23ac6c5ba46dc150e3b
Fixes: QDS-1733
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
