portion of the inner side flange of the guide track shown in FIGS. 3 and 6; FIG. 9 is a perspective view of a door bottom edge stop bracket in accordance with the present invention; FIG. 10 is a detail section view taken generally along the line 10--10 of FIG. 9 and showing the bracket of FIG. 9 assembled to the guide track at the area shown in FIG. 8; and FIG. 11 is a detail section view of an al