Andreas Kling ec6e55cfc6 LibGUI: Don't spam WindowServer with SetWindowOverrideCursor messages ...

Remember the override cursor in GUI::Window and avoid sending a message
to WindowServer when possible.

This removes a lot of synchronous IPC between Browser and WindowServer,
which noticeably improves DOM event responsiveness. :^)

2020-03-22 01:07:07 +01:00

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