* PickView.h (PickView::set_vscroll_info): Add prototype.

	* PickView.h (PickView::set_vscroll_info): Add prototype.
	(PickView::hasClientRect): Rename from this ...
	(PickView::hasWindowRect): ... to this ...
	(PickView::lastClientRect): ... and from this ...
	(PickView::lastWindowRect): ... to this.
	* PickView.cc (PickView::PickView): Adjust member init to match.
	(PickView::set_vscroll_info): Abstract code to set vertical scroll
	bar proportions from ...
	(PickView::list_click): ... here.  Call it.  Fix comment typo.
	(PickView::WindowProc): Update all renamed variables in WM_SIZE
	case, and check also for a y delta, calling set_vscroll_info if so.