需要重新设置QWidget的父类

Log: 修复拖动账户列表向下滚动发现绿色小圆点的位置不会改变的问题
Bug: https://pms.uniontech.com/zentao/bug-view-46359.html
Change-Id: I4f9c25ed257ef68437ac2aa32071f7e8cdf4eed6
Reviewed-on: http://gerrit.uniontech.com/c/dde-control-center/+/3690
Reviewed-by: niecheng <niecheng@uniontech.com>
Reviewed-by: fanpengcheng <fanpengcheng@uniontech.com>
Tested-by: fanpengcheng <fanpengcheng@uniontech.com>