MRG: get bugfixes from release-6.2

Documentation/Cookbook/rst/recipes/improc.rst

Documentation/SoftwareGuide/Latex/Classification.tex

...cations/AppClassification/app/otbKMeansClassification.cxx

...tions/AppClassification/include/otbTrainNeuralNetwork.txx

Modules/Applications/AppImageUtils/app/otbConvert.cxx

...s/Applications/AppImageUtils/app/otbDownloadSRTMTiles.cxx

...pplications/AppSegmentation/app/otbMeanShiftSmoothing.cxx

Modules/Applications/AppStereo/app/otbBlockMatching.cxx

...lications/AppStereo/app/otbDisparityMapToElevationMap.cxx

.../Core/Common/include/otbImageRegionAdaptativeSplitter.txx

Modules/Core/Common/include/otbModelComponentBase.h

.../Core/LabelMap/include/otbShapeAttributesLabelMapFilter.h

...ning/LearningBase/include/otbMachineLearningModelTraits.h

...irdParty/OssimPlugins/src/ossim/ossimCosmoSkymedModel.cpp

.../MonteverdiGui/include/mvdQtWidgetParameterInitializers.h

Modules/Visualization/MonteverdiGui/src/mvdQtWidgetView.cxx

...plicationEngine/src/otbWrapperInputImageListParameter.cxx

Modules/Wrappers/QtWidget/include/otbQtFileSelectionWidget.h

...et/include/otbWrapperQtWidgetComplexInputImageParameter.h

...t/include/otbWrapperQtWidgetComplexOutputImageParameter.h