SpecularGlossyMaterial was added in Qt 6.4. It should be treated like one of the other basic material types

SpecularGlossyMaterial was added in Qt 6.4. It should be treated like one of the other basic material types (DefaultMaterial, PrincipledMaterial, CustomMaterial). 

• It should always appear on fixed spot at the top of the material type popup in material editor.
• Property groups support for it
• Dragging image on it in navigator should pop up target texture property dialog