If the component root is 3D material, we should show preview of it in form editor, similar to how we show preview of components with 3D Node as root.
- resulted from
 - 
                    
QDS-6548 Highend IVI system example opens with error message
-         
 - Closed
 
 -         
 
| For Gerrit Dashboard: QDS-6561 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V | 
| 411550,5 | QmlDesigner: Show form editor preview for 3D material root nodes | 7.0 | qt-creator/qt-creator | Status: MERGED | +2 | 0 |