Improve summary calculation performance

* Only reload calculation data
* Make sure performance is good when a calculated object is added or changed
- avoid recreation of summary file readers
- delete all nodes in address tree representing calculated curves
- build address nodes for calculated curves

ApplicationLibCode/ProjectDataModel/RimUserDefinedCalculationCollection.cpp

@@ -103,9 +103,11 @@ RimUserDefinedCalculation* RimUserDefinedCalculationCollection::addCalculationCo
 //--------------------------------------------------------------------------------------------------
 void RimUserDefinedCalculationCollection::deleteCalculation( RimUserDefinedCalculation* calculation )
 {
-    calculation->removeDependentObjects();
     m_calculations.removeChild( calculation );
 
+    // Call this function after the object is removed from the collection
+    calculation->removeDependentObjects();
+
     rebuildCaseMetaData();
 
     delete calculation;