Pick up wrap events at viewport level, not clones.
Pick up wrap events at viewport level, not clones.

Because of the relocation, the viewport_container (and implicitly clones)
render at negative coordinates. Mouse events are not picked up
at negative coordinates, so events must be picked in some other
actor (viewport is a good candidate).

StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain