Since the default style got renamed to 'Basic',
Style=Default will cause a runtime error with Qt 6.0.0
Avoid this by not setting an explicit style.
Task-number: QTCREATORBUG-24905
Change-Id: I0f35e1dfb38536412da064d9f8ba88264485ef52
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
...and link to Creating Optimized 3D Scenes.
Fixes: QDS-3020
Change-Id: I666afca460e9e0e3afb2b612780f486a094cb45c
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>