Use wayland_server::DisplayHandle::set_default_max_buffer_size

[ids1024]

This matches what sway and mutter use. See niri-wm/niri#1699, niri-wm/niri#1989.

I still need to reproduce the crashes this should address.

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[ids1024]

I guess a mouse with a very high polling rate is the best way to see issues like this.