(#639) Show E (x,1) on axis label

As the space is limited, the text is compressed to "E-x1", "N-y2", "Z-3"

ApplicationCode/ProjectDataModel/RimGeoMechView.h

@@ -101,6 +101,8 @@ private:
     virtual void                                        fieldChangedByUi(const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue);
     virtual void                                        initAfterRead();
 
+    void                                                setCustomAxisCrossLabels();
+
 
     virtual void calculateCurrentTotalCellVisibility(cvf::UByteArray* totalVisibility);