Improve visual appearance for ensemble curves (#9016)

* Ensemble Curves : Improve visual appearance
Set line thickness to 1
If ensemble curves are bright, use a high saturation color for the highlight curve
Increase line thickness for highlighted curve
* Use color by summary vector phase for ensemble curves
* Do not create curves for non-existing history vectors

ApplicationLibCode/ProjectDataModel/Summary/RimEnsembleCurveSet.cpp

@@ -1703,6 +1703,7 @@ void RimEnsembleCurveSet::updateEnsembleCurves( const std::vector<RimSummaryCase
                 curve->setSummaryCaseY( sumCase );
                 curve->setSummaryAddressYAndApplyInterpolation( addr->address() );
                 curve->setResampling( m_resampling() );
+                curve->setLineThickness( 1 );
 
                 addCurve( curve );