rm redundant boolean constants

Core/Fitting/FitObserver.h

GUI/coregui/Models/ComponentProxyStrategy.cpp

GUI/coregui/Models/JobItem.cpp

GUI/coregui/Models/ModelMapper.h

GUI/coregui/Models/ParticleLayoutItem.cpp

...coregui/Views/PropertyEditor/MultiComboPropertyEditor.cpp

GUI/coregui/Views/RealSpaceWidgets/RealSpaceBuilder.cpp

GUI/coregui/Views/SampleDesigner/NodeEditorPort.cpp

GUI/coregui/mainwindow/SaveService.cpp

GUI/main/appoptions.cpp

Tests/Functional/GUI/Other/SaveLoadProject.cpp

Tests/Functional/GUI/Translate/GUITranslationTest.cpp

Tests/Performance/Core/CoreIO.cpp