之前还原逻辑要求考虑屏幕分辨率，现在对该判断进行优化

Log: 设置自定义合并模式分辨率还原问题
Bug: https://pms.uniontech.com/zentao/bug-view-42328.html
Change-Id: Ic1b3351a3155515b3439380d535d7e569f2cd417
Reviewed-on: http://gerrit.uniontech.com/c/dde-control-center/+/2191
Reviewed-by: <mailman@uniontech.com>
Reviewed-by: lizhongming <lizhongming@uniontech.com>
Tested-by: <mailman@uniontech.com>