Reintroduce deleted line

An earlier commit removed this line

ApplicationCode/ProjectDataModel/RimEclipseView.cpp

@@ -2258,7 +2258,10 @@ bool RimEclipseView::isUsingFormationNames() const
 {
     if ( cellResult()->resultType() == RiaDefines::ResultCatType::FORMATION_NAMES ) return true;
 
-    return true;
+    if ( faultResultSettings()->customFaultResult()->resultType() == RiaDefines::ResultCatType::ALLAN_DIAGRAMS )
+    {
+        return true;
+    }
 
     return eclipsePropertyFilterCollection()->isUsingFormationNames();
 }