Base/ToolButtonStyle: fix the background of checked buttons
Base/ToolButtonStyle: fix the background of checked buttons

Task-number: QTBUG-32542
Change-Id: Idcad5f016830f63dae46167ab8a8cd979234a3b2
Reviewed-by: Caroline Chao <cb6a0059f4e516e853a34cb558c25ca5a9bcf4ab@digia.com>

mizukusak/qtquickcontrols,drgvond/qtquickcontrols,drgvond/qtquickcontrols,kobolabs/qtquickcontrols,mizukusak/qtquickcontrols,kobolabs/qtquickcontrols,drgvond/qtquickcontrols,mizukusak/qtquickcontrols,kobolabs/qtquickcontrols