Merge V9_dev branch into master

diff --cc src/GUI/NETGENPluginGUI_HypothesisCreator.cxx
Simple merge

diff --cc src/NETGENPlugin/NETGENPlugin_Mesher.cxx
Simple merge

diff --cc src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.cxx
Simple merge

diff --cc src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
Simple merge

diff --cc src/NETGENPlugin/NETGENPlugin_Remesher_2D.cxx
Simple merge