Invert default isCurveHighlightSupported flag for RimPlot

- Make default flag = false, thus highlighting must be activated
- To prevent unwanted logic for new RimPlot objects
- Activate highlighting for RimSummaryPlot, RimVfpPlot and RimCorrelationMatrixPlot

ApplicationLibCode/ProjectDataModel/RimVfpPlot.cpp

@@ -172,6 +172,14 @@ RiuPlotWidget* RimVfpPlot::plotWidget()
     return m_plotWidget;
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+bool RimVfpPlot::isCurveHighlightSupported() const
+{
+    return true;
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------