#8405 Source Stepping on multiple graphs

- add copy paste of plots into multi summary plot
- improve data source stepping for multi plot
- improve auto generated plot name, graph name and curve name
Fixes by clang-format

Improve readability

ApplicationLibCode/ProjectDataModel/Summary/RimSummaryPlotManager.cpp

@@ -52,6 +52,12 @@
 #include "cafPdmUiTreeSelectionEditor.h"
 #include "cafSelectionManager.h"
 
+// Multi plot
+#include "RimMainPlotCollection.h"
+#include "RimMultiPlotCollection.h"
+#include "RimProject.h"
+#include "RimSummaryMultiPlot.h"
+
 #include <QKeyEvent>
 
 CAF_PDM_SOURCE_INIT( RimSummaryPlotManager, "RimSummaryPlotManager" );
@@ -387,6 +393,17 @@ void RimSummaryPlotManager::createNewPlot()
         }
 
         RicSummaryPlotBuilder::createAndAppendMultiPlot( plotsForMultiPlot );
+
+        {
+            auto                  myCopyOfPlots = plotBuilder.createPlots();
+            std::vector<RimPlot*> myRimPlots;
+            for ( auto p : myCopyOfPlots )
+            {
+                p->loadDataAndUpdate();
+                myRimPlots.push_back( dynamic_cast<RimPlot*>( p ) );
+            }
+            RimSummaryMultiPlot::createAndAppendMultiPlot( myRimPlots );
+        }
     }
     else
     {