New InstrumentComponentsWidget and co.

GUI/coregui/Models/BeamItem.cpp

GUI/coregui/Models/BeamItem.h

GUI/coregui/Models/ItemFactory.cpp

GUI/coregui/Models/LayerItem.cpp

GUI/coregui/Models/LayerRoughnessItems.cpp

GUI/coregui/Models/item_constants.h

...ui/Views/InstrumentWidgets/InstrumentComponentsWidget.cpp

...egui/Views/InstrumentWidgets/InstrumentComponentsWidget.h

...oregui/Views/InstrumentWidgets/InstrumentEditorWidget.cpp

GUI/coregui/Views/InstrumentWidgets/InstrumentEditorWidget.h

GUI/coregui/Views/InstrumentWidgets/TestBeamEditorWidget.cpp

GUI/coregui/Views/InstrumentWidgets/TestBeamEditorWidget.h

GUI/coregui/Views/PropertyEditor/AwesomePropertyEditor.cpp

GUI/coregui/Views/PropertyEditor/AwesomePropertyEditor.h

GUI/coregui/Views/PropertyEditor/PropertyBrowserUtils.cpp

GUI/coregui/Views/PropertyEditor/PropertyVariantFactory.cpp

GUI/coregui/Views/TestView.cpp

GUI/coregui/mainwindow/mainwindow.cpp