macOS 移动到扩展屏选项被禁用

[L-Super]

在有扩展屏的情况下，最大化按钮hover态会提供移动到另一块屏幕的选项，但使用qwindowkit后，该选项被禁用。 正常窗口：

使用qwindowkit后的窗口：

[EdnY1]

I think this might be related with the previous information provided on the issue #100, QWindowKit is not handling/working/detecting extended display, that's why when QWindowKit is setting the titlebar the "Move to another display" functionality is not working.