Merge remote-tracking branch 'upstream/develop' into develop

GUI/coregui/Models/ApplicationModels.cpp

GUI/coregui/Models/BeamItem.cpp

GUI/coregui/Models/ComponentProxyModel.cpp

GUI/coregui/Models/FilterPropertyProxy.cpp

GUI/coregui/Models/MaterialDataItem.cpp

GUI/coregui/Models/ObsoleteScientificDoubleProperty.h

GUI/coregui/Models/ParameterTreeItems.cpp

GUI/coregui/Models/ParameterTreeUtils.cpp

GUI/coregui/Models/ParameterTuningModel.cpp

GUI/coregui/Models/SessionFlags.h

GUI/coregui/Models/SessionItem.cpp

GUI/coregui/Models/SessionItem.h

GUI/coregui/Models/SessionModel.cpp

GUI/coregui/Models/SessionModel.h

GUI/coregui/Models/SessionModelDelegate.cpp

GUI/coregui/Models/SessionModelDelegate.h

GUI/coregui/Models/SessionXML.cpp

GUI/coregui/Models/item_constants.h

GUI/coregui/Views/PropertyEditor/ComponentFlatView.cpp

GUI/coregui/Views/PropertyEditor/ComponentTreeActions.cpp