Refactoring in MaterialBrowser and PropertyBrowser

GUI/coregui/Views/Components/SampleDesigner/DesignerHelper.h

GUI/coregui/Views/Components/SampleDesigner/ISampleView.h

GUI/coregui/Views/Components/SampleDesigner/LayerView.cpp

GUI/coregui/Views/Components/SampleDesigner/LayerView.h

...regui/Views/Components/SampleDesigner/MaterialBrowser.cpp

...coregui/Views/Components/SampleDesigner/MaterialBrowser.h

...i/Views/Components/SampleDesigner/MaterialBrowserView.cpp

...gui/Views/Components/SampleDesigner/MaterialBrowserView.h

...oregui/Views/Components/SampleDesigner/MaterialProperty.h

...oregui/Views/Components/SampleDesigner/MultiLayerView.cpp

GUI/coregui/Views/Components/SampleDesigner/MultiLayerView.h

.../Views/Components/SampleDesigner/PropertyBrowserUtils.cpp

...iews/Components/SampleDesigner/PropertyVariantFactory.cpp

.../Views/Components/SampleDesigner/PropertyVariantFactory.h

...iews/Components/SampleDesigner/PropertyVariantManager.cpp

.../Views/Components/SampleDesigner/PropertyVariantManager.h

.../Views/Components/SampleDesigner/SamplePropertyEditor.cpp

...ui/Views/Components/SampleDesigner/SamplePropertyEditor.h

...coregui/Views/Components/SampleDesigner/SampleToolBar.cpp

GUI/coregui/mainwindow/main.cpp