Merge branch 'variMod' into 'develop'

GUI/Model/Job/ParameterTreeUtils.cpp

GUI/Model/Material/MaterialModel.cpp

GUI/Model/Sample/ItemWithParticles.cpp

GUI/Model/Sample/ItemWithParticles.h

GUI/Model/Sample/ItemWithParticlesCatalog.cpp

GUI/Model/Sample/ItemWithParticlesCatalog.h

GUI/Model/Sample/MesoCrystalItem.cpp

GUI/Model/Sample/MesoCrystalItem.h

GUI/Model/Sample/ParticleCompositionItem.cpp

GUI/Model/Sample/ParticleCoreShellItem.cpp

GUI/Model/Sample/ParticleItem.cpp

GUI/Model/Sample/ParticleLayoutItem.cpp

GUI/Model/Sample/ParticleLayoutItem.h

GUI/View/Realspace/RealSpaceCanvas.cpp

GUI/View/SampleDesigner/MesoCrystalForm.cpp

GUI/View/SampleDesigner/ParticleCompositionForm.cpp

GUI/View/SampleDesigner/ParticleCoreShellForm.cpp

GUI/View/SampleDesigner/ParticleForm.cpp

GUI/View/SampleDesigner/ParticleLayoutForm.cpp

GUI/View/SampleDesigner/SampleEditorController.cpp