Refactor in Modules/Wrappers/QtWidget

See merge request orfeotoolbox/otb!161

Merge release-6.6 into develop without the shark revert

Closes #1633

See merge request orfeotoolbox/otb!160

BUG: Improve Convert and DynamicConvert mask handling (fix #1647)

Closes #1647

See merge request orfeotoolbox/otb!159

ENH: Add box kernel to morphological operations apps

See merge request orfeotoolbox/otb!158

Refactor of otbWrapperApplication.h

See merge request orfeotoolbox/otb!150

This reverts commit 81bed5ae, reversing
changes made to f3749c05.

ENH: Document that conversion applications in otb don't support complex pixel types as output

See merge request orfeotoolbox/otb!153

ENH: Allow to compute modulus and phase from 2 bands scalar image

See merge request orfeotoolbox/otb!154

BUG fix issue 1656 related to eratic behavior of cmake configuration

Closes #1656

See merge request orfeotoolbox/otb!156

rename files with txx extension to hxx

See merge request orfeotoolbox/otb!152

For now complex pixel types are not supported by Convert and DynamicConvert
applications (see switch/case in the generic DoExecute method). This commit just
document this limitation.

Note that the ExtractROI application can be used to convert image from/to
complex image.