ENH: OTB-applications wrappers: initialized directory of file-dialog openend when using browse button with edited text.

ENH: Moved otb::Wrapper::QtWidgetOutputFilenameParameter::SetFileName() and ::QtWidgetOutputVectorDataParameter::SetFileName() into public slots section.

COMP: Adding a new method in the version proxy to wrap the GetDriver()->GetName() code, and use it in Segmentation application