rename namespace DaRefl -> gui2

.../UnitTests/gui2/testdareflcore/applicationmodels.test.cpp

Tests/UnitTests/gui2/testdareflcore/datahandler.test.cpp

...s/UnitTests/gui2/testdareflcore/dataloader_utils.test.cpp

...UnitTests/gui2/testdareflcore/dataselectionmodel.test.cpp

Tests/UnitTests/gui2/testdareflcore/defaultparser.test.cpp

...tTests/gui2/testdareflcore/experimentaldatamodel.test.cpp

...ests/gui2/testdareflcore/importdataeditoractions.test.cpp

.../UnitTests/gui2/testdareflcore/importtableheader.test.cpp

Tests/UnitTests/gui2/testdareflcore/instrumentitems.test.cpp

...UnitTests/gui2/testdareflcore/layereditoractions.test.cpp

Tests/UnitTests/gui2/testdareflcore/layerelements.test.cpp

Tests/UnitTests/gui2/testdareflcore/layeritems.test.cpp

...nitTests/gui2/testdareflcore/layerselectionmodel.test.cpp

Tests/UnitTests/gui2/testdareflcore/layerviewmodel.test.cpp

Tests/UnitTests/gui2/testdareflcore/materialprofile.test.cpp

Tests/UnitTests/gui2/testdareflcore/modelutils.test.cpp

Tests/UnitTests/gui2/testdareflcore/quicksimutils.test.cpp

...itTests/gui2/testdareflcore/sldelementcontroller.test.cpp

gui2/core/app_constants.h

gui2/core/version.h