Change API for PdmObjectHandle and PdmFieldHandle

* Refactor interface to PdmObjectHandle and PdmFieldHandle
Return objects instead of passing in structures as parameters

* Add nodiscard to several functions
* Remove redundant this->
* Rename to ptrReferencedObjectsByType

ApplicationLibCode/ProjectDataModel/RimEclipseContourMapView.cpp

@@ -108,8 +108,7 @@ QString RimEclipseContourMapView::createAutoName() const
 
     QStringList generatedAutoTags;
 
-    RimCase* ownerCase = nullptr;
-    this->firstAncestorOrThisOfTypeAsserted( ownerCase );
+    RimCase* ownerCase = firstAncestorOrThisOfTypeAsserted<RimCase>();
 
     if ( nameConfig()->addCaseName() )
     {