bug#52883: xwidget-webkit webinspector segfaults emacs on sway

[akira]

Steps to reproduce:

- run an emacs -Q compiled --with-xwidgets under xwayland on sway
- M-x xwidget-webkit-browse-url RET then type in any valid website
- right click on any element then select 'Inspect Element'
- the xwidget will freeze and be difficult to interact with
- C-x k to kill the buffer then emacs will segfault