Excessive makeCurrent - doneCurrent pairs should be avoided. We already
do this in QOpenGLWidget and the QPlatformBackingStore composition code.
Remove the doneCurrent from QQuickWidget too.
Change-Id: I6f998d381c33880c470f34d7c8462b6ed8cd8ae9 Reviewed-by: Gunnar Sletta <gunnar@sletta.org>