[i599] Fix 2D data rotation (#599) (Closes #599)

Merging branch 'i599'  into 'main'.

See merge request !1642

GUI/Model/Device/RealItem.cpp

@@ -302,7 +302,7 @@ void RealItem::rotateData()
     }
 
     // -- now rotate data
-    std::unique_ptr<const Datafield> input(intensityDataItem()->c_field());
+    const Datafield* input = intensityDataItem()->c_field();
     intensityDataItem()->setDatafield(DataUtil::Data::createRearrangedDataSet(*input, 1).release());
     intensityDataItem()->setAxesRangeToData();
 }