Window moving starts in wrong position at 200% scaling

[felixonmars]

When moving a window with 200% scaling settings, a window "jumps" to its 2x coordinates and starts moving. When using kwin the window starts moving in its original position, but the mouse cursor "jumps" to its 2x coordinates.

Only present in UKUI app windows like the control panel.

[kylin-ccn]

这个与窗口管理器无关(包括kwin和ukwm)，无边框窗体对头部鼠标定位没做2倍缩放导致。文件管理器和控制面板需单独处理。