Consolidate DepthProbeInstrumentItem::P_BEAM

GUI/Models/InstrumentItems.cpp

@@ -384,14 +384,13 @@ ICoordSystem* OffSpecularInstrumentItem::createCoordSystem() const
 //  ************************************************************************************************
 
 
-const QString DepthProbeInstrumentItem::P_BEAM = "Beam";
 const QString DepthProbeInstrumentItem::P_Z_AXIS = "Z axis";
 
 DepthProbeInstrumentItem::DepthProbeInstrumentItem() : InstrumentItem("DepthProbeInstrument")
 {
     setItemName("DepthProbeInstrument");
 
-    addProperty<SpecularBeamItem>(P_BEAM);
+    addBeam<SpecularBeamItem>();
 
     auto axisItem = beamItem()->currentInclinationAxisItem();
     axisItem->setLowerBound(0.0);
@@ -409,7 +408,7 @@ DepthProbeInstrumentItem::DepthProbeInstrumentItem() : InstrumentItem("DepthProb
 
 SpecularBeamItem* DepthProbeInstrumentItem::beamItem() const
 {
-    return item<SpecularBeamItem>(P_BEAM);
+    return beam<SpecularBeamItem>();
 }
 
 std::unique_ptr<Instrument> DepthProbeInstrumentItem::createInstrument() const

GUI/Models/InstrumentItems.h

@@ -136,7 +136,6 @@ public:
 
 class BA_CORE_API_ DepthProbeInstrumentItem : public InstrumentItem {
 public:
-    static const QString P_BEAM;
     static const QString P_Z_AXIS;
 
     DepthProbeInstrumentItem();