wayland: unset sequence if the xdg surface is moved/resized through touch
wayland: unset sequence if the xdg surface is moved/resized through touch

The latest implicit grab serial is used in order to start the compositor
grab, If it belongs to a touch event, remove that touch sequence, as the
rest of the sequence will be gone for good.

This avoids stale sequences (and implicit grab info) after a window is
moved/resized.

https://bugzilla.gnome.org/show_bug.cgi?id=731380

ahodesuka/gtk,grubersjoe/adwaita,Adamovskiy/gtk,Adamovskiy/gtk,ahodesuka/gtk,davidgumberg/gtk,Lyude/gtk-,jigpu/gtk,jigpu/gtk,Adamovskiy/gtk,chergert/gtk,chergert/gtk,jadahl/gtk,chergert/gtk,ahodesuka/gtk,alexlarsson/gtk,jessevdk/gtk,chergert/gtk,davidgumberg/gtk,chergert/gtk,Adamovskiy/gtk,jessevdk/gtk,Lyude/gtk-,jigpu/gtk,jessevdk/gtk,grubersjoe/adwaita,jadahl/gtk,alexlarsson/gtk,davidgumberg/gtk,jadahl/gtk,jessevdk/gtk,grubersjoe/adwaita,ahodesuka/gtk,jadahl/gtk,Lyude/gtk-,Adamovskiy/gtk,jadahl/gtk,chergert/gtk,grubersjoe/adwaita,Adamovskiy/gtk,chergert/gtk,jessevdk/gtk,Adamovskiy/gtk,Lyude/gtk-,jigpu/gtk,Lyude/gtk-,jigpu/gtk,alexlarsson/gtk,davidgumberg/gtk,jadahl/gtk,ahodesuka/gtk,jadahl/gtk,ahodesuka/gtk,grubersjoe/adwaita,jigpu/gtk,jigpu/gtk,davidgumberg/gtk,jigpu/gtk,jadahl/gtk,jessevdk/gtk,chergert/gtk,grubersjoe/adwaita,davidgumberg/gtk,alexlarsson/gtk,Lyude/gtk-,grubersjoe/adwaita,ahodesuka/gtk,alexlarsson/gtk,jessevdk/gtk,Lyude/gtk-,Adamovskiy/gtk,alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,Lyude/gtk-,alexlarsson/gtk,davidgumberg/gtk,davidgumberg/gtk,ahodesuka/gtk