app: don't scale hotspot in Wayland
The hotspot coords are in the cairo surface's coords space, and the cairo surface has half the size as the x2 pixbuf because of scale=2, which makes the hotspot coords remain the same.
With regard to the referred code snippet in the comment, the coords have been scaled in gdk_cursor_new_from_surface.
This fixes #9047 (closed).
update: fixed explanation.
Edited by lilydjwg