Additional refactoring for POR-Bar result handling

* Always use element-nodal for POR calculations
* Add RigFemAddressDefines
Add special handling for "POR-Bar" result, always use element_nodal

* 9362 Show unit text "sg" when normalized by hydrostatic pressure

ApplicationLibCode/ProjectDataModel/WellPath/RimWellIASettings.cpp

@@ -21,6 +21,7 @@
 #include "RiaApplication.h"
 #include "RiaPreferencesGeoMech.h"
 
+#include "RigFemAddressDefines.h"
 #include "RigWellPath.h"
 #include "RigWellPathGeometryTools.h"
 
@@ -476,7 +477,12 @@ bool RimWellIASettings::updateResInsightParameters()
         }
     }
 
-    double ppValue = dataAccess.interpolatedResultValue( "POR-Bar", "", RigFemResultPosEnum::RIG_NODAL, position, 0, 0 );
+    double ppValue = dataAccess.interpolatedResultValue( QString::fromStdString( RigFemAddressDefines::porBar() ),
+                                                         "",
+                                                         RigFemResultPosEnum::RIG_NODAL,
+                                                         position,
+                                                         0,
+                                                         0 );
     if ( std::isfinite( ppValue ) )
     {
         initialStress->addParameter( "PP", ppValue * 100000.0 );