ProjectLoadWarningDialog is adapted to new MessageService

GUI/coregui/Models/InstrumentModel.cpp

GUI/coregui/Models/JobModel.cpp

GUI/coregui/Models/MaterialModel.cpp

GUI/coregui/Models/SampleModel.cpp

GUI/coregui/Models/SessionModel.cpp

GUI/coregui/Views/InfoWidgets/ProjectLoadWarningDialog.cpp

GUI/coregui/Views/InfoWidgets/ProjectLoadWarningDialog.h

GUI/coregui/mainwindow/projectdocument.cpp

GUI/coregui/mainwindow/projectdocument.h

GUI/coregui/mainwindow/projectmanager.cpp

GUI/coregui/utils/GUIMessage.cpp

GUI/coregui/utils/GUIMessage.h

GUI/coregui/utils/MessageContainer.h

GUI/coregui/utils/WarningMessageService.cpp

GUI/coregui/utils/WarningMessageService.h