Support delete of multiple sub plots in one operation

ApplicationLibCode/Commands/WellLogCommands/RicDeleteSubPlotFeature.cpp

@@ -48,6 +48,8 @@ bool RicDeleteSubPlotFeature::isCommandEnabled()
 
     if ( selection.size() > 0 )
     {
+        if ( dynamic_cast<RimMultiPlot*>( selection.front() ) ) return false;
+
         size_t plotsSelected = 0;
         for ( caf::PdmObject* object : selection )
         {

ApplicationLibCode/ProjectDataModel/RimContextCommandBuilder.cpp

@@ -1120,6 +1120,7 @@ caf::CmdFeatureMenuBuilder RimContextCommandBuilder::commandsFromSelection()
         menuBuilder << "RicCloseSummaryCaseInCollectionFeature";
         menuBuilder << "RicDeleteSummaryCaseCollectionFeature";
         menuBuilder << "RicCloseObservedDataFeature";
+        menuBuilder << "RicDeleteSubPlotFeature";
 
         menuBuilder << "RicNewMultiPlotFeature";
         menuBuilder << "RicAppendSummaryPlotsForObjectsFeature";