for consistency with other interface classes

    t = re.sub(r'(\W)(Simulation)(\W)', r'\1I\2\3', t)
    t = re.sub(r'(/)I(Simulation)', r'\1\2', t)

As recommended by
https://google.github.io/styleguide/cppguide.html#The__define_Guard

Redmine: #2142

Redmine: #2106

Redmine: #2105

Redmine: #2051

1. Presentation type is determined solely by JobResultsPresenter
2. JobItem::P_PRESENTATION_TYPE used for memorizing the user choice
   of presentation
3. New widget type constant - FitComparisonPresentation1D
4. Renamed FitComparisonPresentation to FitComparisonPresentation2D

Redmine: #1936

Redmine: #1936