Merge pull request #8754 from OPM/multiplot_improvements

Summary Multiplot: add new plot from a single curve in an ensemble plot and improve general plot performance

ApplicationLibCode/UserInterface/RiuWellLogPlot.h

@@ -45,7 +45,7 @@ private:
 
 private slots:
     void slotSetMinDepth( int value );
-    void performUpdate() override;
+    void performUpdate( RiaDefines::MultiPlotPageUpdateType whatToUpdate ) override;
 
 private:
     QPointer<QVBoxLayout> m_verticalTrackScrollBarLayout;