BUG: 817 input imagelist parameter not saving from otbgui applications.

missing ParameterChanged emit in QtWidget
InputImageListParameter not set to Active when calling SetNthFileName

Code/ApplicationEngine/otbWrapperInputImageListParameter.cxx

@@ -149,6 +149,7 @@ InputImageListParameter::SetNthFileName( const unsigned int id, const std::strin
     m_ImageList->SetNthElement(id, reader->GetOutput());
 
     this->Modified();
+    SetActive(true);
     return true;
     }
 

Code/Wrappers/QtWidget/otbWrapperQtWidgetInputImageListParameter.cxx

@@ -161,6 +161,10 @@ QtWidgetInputImageListParameter::UpdateImageList()
     }
 
   emit Change();
+
+  // notify of value change
+  QString key(m_InputImageListParam->GetKey());
+  emit ParameterChanged(key);
 }
 
 void