Refs #16962 Refactoring and updating documentation

MantidPlot/src/Mantid/InstrumentWidget/InstrumentWindow.cpp

MantidPlot/src/Mantid/InstrumentWidget/InstrumentWindow.h

MantidQt/API/inc/MantidQtAPI/TSVSerialiser.h

MantidQt/API/src/TSVSerialiser.cpp

...dQtMantidWidgets/InstrumentView/InstrumentWidgetPickTab.h

...antidQtMantidWidgets/InstrumentView/InstrumentWidgetTab.h

...dQtMantidWidgets/InstrumentView/InstrumentWidgetTreeTab.h

...s/inc/MantidQtMantidWidgets/InstrumentView/Projection3D.h

.../MantidQtMantidWidgets/InstrumentView/ProjectionSurface.h

...idgets/inc/MantidQtMantidWidgets/InstrumentView/Shape2D.h

.../MantidQtMantidWidgets/InstrumentView/Shape2DCollection.h

...c/MantidQtMantidWidgets/InstrumentView/UnwrappedSurface.h

...tidWidgets/src/InstrumentView/InstrumentWidgetMaskTab.cpp

...tidWidgets/src/InstrumentView/InstrumentWidgetPickTab.cpp

...dWidgets/src/InstrumentView/InstrumentWidgetRenderTab.cpp

...tidWidgets/src/InstrumentView/InstrumentWidgetTreeTab.cpp

MantidQt/MantidWidgets/src/InstrumentView/MaskBinsData.cpp

MantidQt/MantidWidgets/src/InstrumentView/Projection3D.cpp

...Qt/MantidWidgets/src/InstrumentView/ProjectionSurface.cpp

MantidQt/MantidWidgets/src/InstrumentView/Shape2D.cpp