list vertically. This supposes that the list is packed into a
scrolled window or something similar, and adjustments are well
set. Step and page increment are those from the vertical adjustment
of list. Backward means up, and forward down. Out of bounds values are
truncated.
scroll.type may be any valid GtkScrollType. If scroll.type is
GTK_SCROLL_NONE, nothing is done. If it's GTK_SCROLL_JUMP, the list
scrolls to the ratio position: 0 is top, 1 is bottom.
WARNING: gtk_list_scroll_vertical is deprecated and should not be used in newly-written code.
gtkListScrollVertical(object, scroll.type, position)objectscroll.typepositionscroll.type is GTK_SCROLL_JUMP