Convert remaining clients to xdg-shell
simple-touch and multi-resource were still using wl_shell, so convert them to xdg-shell.
Bail out sooner insimple-egl in case wm_base interface wasn't found to avoid a potential crash.
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simple-touch and multi-resource were still using wl_shell, so convert them to xdg-shell.
Bail out sooner insimple-egl in case wm_base interface wasn't found to avoid a potential crash.