3D Well Log Curves (#2669): Implement control of single color.

* Set a cycled default whenever a curve is added to a collection.

ApplicationCode/ProjectDataModel/Completions/Rim3dWellLogCurveCollection.cpp

@@ -77,6 +77,8 @@ void Rim3dWellLogCurveCollection::add3dWellLogCurve(Rim3dWellLogCurve* curve)
 {
     if (curve)
     {
+        size_t index = m_3dWellLogCurves.size();
+        curve->setColor(RiaColorTables::wellLogPlotPaletteColors().cycledColor3f(index));
         m_3dWellLogCurves.push_back(curve);
     }
 }