gdk/x11: Reset all scroll valuators on enter

gdk/x11: Reset all scroll valuators on enter

We no longer need to make much distinction between multiple logical
devices, plus it breaks esp. with the Xwayland input device distribution.
Just iterate across all devices and reset their scroll valuators.

Origin: https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/5479
Bug: https://gitlab.gnome.org/GNOME/gtk/-/issues/4160
Bug: https://gitlab.gnome.org/GNOME/gtk/-/issues/5202
Bug-Debian: https://bugs.debian.org/1029972
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/gtk4/+bug/1993594
Applied-upstream: 4.9.3, commit:824e983372d939693f7eba5c394e647a9035a0f8

Gbp-Pq: Name gdk-x11-Reset-all-scroll-valuators-on-enter.patch