Experimentally support setting cursor position on wayland using ydotool.

Important Notes

This feature depends on ydotool which needs to be installed and configured manually, here are the major steps:
1.Install ydotool if it doesn't exist.
2.Make your user be able to run sudo command without password(edit /etc/sudoers, add a line <yourusername> ALL=(ALL) NOPASSWD:ALL)

Since this feature is implemeted by executing external process, you may experience lags while opening guis frequently.