cursor: Update focus at various additional points

- When XDG and XWayland views are positioned (view_moved()).
- When unmanaged XWayland surfaces are mapped, unmapped, or moved.

Do not update cursor focus during an out-of-surface drag.

Along with the existing call in desktop_move_to_front(), this
should hopefully cover the majority of cases where the cursor focus
could get out-of-date, with the possible exception of layer-shell
surfaces.

src/view.c

@@ -149,6 +149,7 @@ view_moved(struct view *view)
 	wlr_scene_node_set_position(&view->scene_tree->node, view->x, view->y);
 	view_discover_output(view);
 	ssd_update_geometry(view);
+	cursor_update_focus(view->server);
 }
 
 /* N.B. Use view_move() if not resizing. */